diff --git a/core/src/main/java/ru/trader/store/berkeley/BDBMarket.java b/core/src/main/java/ru/trader/store/berkeley/BDBMarket.java
new file mode 100644
index 0000000..e335a2d
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/BDBMarket.java
@@ -0,0 +1,84 @@
+package ru.trader.store.berkeley;
+
+import ru.trader.core.*;
+import ru.trader.store.berkeley.entities.BDBGroup;
+import ru.trader.store.berkeley.entities.BDBItem;
+import ru.trader.store.berkeley.entities.BDBPlace;
+
+import java.util.Collection;
+
+public class BDBMarket extends AbstractMarket {
+    private final BDBStore store;
+
+
+    public BDBMarket(BDBStore store) {
+        this.store = store;
+    }
+
+    @Override
+    protected Place createPlace(String name, double x, double y, double z) {
+        return new PlaceProxy(new BDBPlace(name, x, y, z), store);
+    }
+
+    @Override
+    protected Group createGroup(String name, GROUP_TYPE type) {
+        return new BDBGroup(name, type);
+    }
+
+    @Override
+    protected Item createItem(String name, Group group) {
+        return new ItemProxy(new BDBItem(name, group.getName()), store);
+    }
+
+    @Override
+    protected void addPlace(Place place) {
+        store.getPlaceAccessor().put(((PlaceProxy) place).getEntity());
+    }
+
+    @Override
+    protected void removePlace(Place place) {
+        store.getPlaceAccessor().delete(((PlaceProxy) place).getEntity());
+    }
+
+    @Override
+    protected void addGroup(Group group) {
+        store.getGroupAccessor().put((BDBGroup) group);
+    }
+
+    @Override
+    protected void removeGroup(Group group) {
+        store.getGroupAccessor().delete((BDBGroup) group);
+    }
+
+    @Override
+    protected void addItem(Item item) {
+        store.getItemAccessor().put(((ItemProxy) item).getEntity());
+    }
+
+    @Override
+    protected void removeItem(Item item) {
+        store.getItemAccessor().delete(((ItemProxy) item).getEntity());
+    }
+
+    @Override
+    public Collection<Place> get() {
+        return store.getPlaceAccessor().getAll();
+    }
+
+    @Override
+    public Collection<Group> getGroups() {
+        return store.getGroupAccessor().getAll();
+    }
+
+    @Override
+    public Collection<Item> getItems() {
+        return store.getItemAccessor().getAll();
+    }
+
+    @Override
+    public ItemStat getStat(OFFER_TYPE type, Item item) {
+        //TODO: добавить
+        return null;
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/BDBStore.java b/core/src/main/java/ru/trader/store/berkeley/BDBStore.java
index 4febc4d..037957d 100644
--- a/core/src/main/java/ru/trader/store/berkeley/BDBStore.java
+++ b/core/src/main/java/ru/trader/store/berkeley/BDBStore.java
@@ -1,12 +1,15 @@
 package ru.trader.store.berkeley;
 
-import com.sleepycat.je.Database;
-import com.sleepycat.je.DatabaseConfig;
 import com.sleepycat.je.DatabaseException;
 import com.sleepycat.je.Environment;
 import com.sleepycat.je.EnvironmentConfig;
+import com.sleepycat.persist.EntityStore;
+import com.sleepycat.persist.StoreConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import ru.trader.core.*;
+import ru.trader.store.berkeley.dao.*;
+import ru.trader.store.berkeley.entities.BDBGroup;
 
 import java.io.File;
 
@@ -14,7 +17,12 @@ public class BDBStore {
     private static final Logger LOG = LoggerFactory.getLogger(BDBStore.class);
 
     private final Environment dbEnvironment;
-    private final Database db;
+    private final EntityStore store;
+    private final VendorDA<Vendor> vDA;
+    private final OfferDA<Offer> oDA;
+    private final ItemDA<Item> iDA;
+    private final GroupDA<Group> gDA;
+    private final PlaceDA<Place> pDA;
 
     public BDBStore(String path){
         EnvironmentConfig envConfig = new EnvironmentConfig();
@@ -24,9 +32,15 @@ public class BDBStore {
         dbEnvironment = new Environment(new File(path), envConfig);
 
         try {
-            DatabaseConfig dbConfig = new DatabaseConfig();
+            StoreConfig dbConfig = new StoreConfig();
             dbConfig.setAllowCreate(true);
-            db = dbEnvironment.openDatabase(null, "Trader", dbConfig);
+            store = new EntityStore(dbEnvironment, "TraderStore", dbConfig);
+            vDA = new VendorDA<>(store, v -> new VendorProxy(v, this));
+            oDA = new OfferDA<>(store, o -> new OfferProxy(o, this));
+            iDA = new ItemDA<>(store, i -> new ItemProxy(i, this));
+            gDA = new GroupDA<>(store, g -> g);
+            pDA = new PlaceDA<>(store, p -> new PlaceProxy(p, this));
+
         } catch (DatabaseException e){
             LOG.error("Error on open DB, path {}", path);
             LOG.error("",e);
@@ -34,11 +48,31 @@ public class BDBStore {
         }
     }
 
+    public VendorDA<Vendor> getVendorAccessor() {
+        return vDA;
+    }
+
+    public OfferDA<Offer> getOfferAccessor() {
+        return oDA;
+    }
+
+    public ItemDA<Item> getItemAccessor() {
+        return iDA;
+    }
+
+    public GroupDA<Group> getGroupAccessor() {
+        return gDA;
+    }
+
+    public PlaceDA<Place> getPlaceAccessor() {
+        return pDA;
+    }
+
 
     public void close(){
-        if (db != null) {
+        if (store != null) {
             try {
-                db.close();
+                store.close();
             } catch (DatabaseException e){
                 LOG.error("Error on close DB", e);
             }
diff --git a/core/src/main/java/ru/trader/store/berkeley/ItemProxy.java b/core/src/main/java/ru/trader/store/berkeley/ItemProxy.java
new file mode 100644
index 0000000..fef2692
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/ItemProxy.java
@@ -0,0 +1,42 @@
+package ru.trader.store.berkeley;
+
+import ru.trader.core.AbstractItem;
+import ru.trader.core.Group;
+import ru.trader.store.berkeley.entities.BDBItem;
+
+public class ItemProxy extends AbstractItem {
+    private final BDBItem item;
+    private final BDBStore store;
+    private final Group group;
+
+    public ItemProxy(BDBItem item, BDBStore store) {
+        this.item = item;
+        this.group = store.getGroupAccessor().get(item.getGroupId());
+        this.store = store;
+    }
+
+    protected long getId(){
+        return item.getId();
+    }
+
+    protected BDBItem getEntity(){
+        return item;
+    }
+
+    @Override
+    protected void updateName(String name) {
+        item.setName(name);
+        store.getItemAccessor().update(item);
+    }
+
+    @Override
+    public String getName() {
+        return item.getName();
+    }
+
+    @Override
+    public Group getGroup() {
+        return group;
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/OfferProxy.java b/core/src/main/java/ru/trader/store/berkeley/OfferProxy.java
new file mode 100644
index 0000000..084134e
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/OfferProxy.java
@@ -0,0 +1,72 @@
+package ru.trader.store.berkeley;
+
+import ru.trader.core.*;
+import ru.trader.store.berkeley.entities.BDBOffer;
+
+public class OfferProxy extends AbstractOffer {
+    private final BDBOffer offer;
+    private final Item item;
+    private BDBStore store;
+    private Vendor vendor;
+
+    public OfferProxy(BDBOffer offer, BDBStore store) {
+        this.offer = offer;
+        this.item = store.getItemAccessor().get(offer.getItemId());
+        this.store = store;
+    }
+
+    protected long getId() {
+        return offer.getId();
+    }
+
+    protected BDBOffer getEntity() {
+        return offer;
+    }
+
+    protected void setVendor(VendorProxy vendor) {
+        offer.setVendor(vendor.getId());
+        this.vendor = vendor;
+        store.getOfferAccessor().update(offer);
+    }
+
+    @Override
+    protected void updatePrice(double price) {
+        offer.setPrice(price);
+        store.getOfferAccessor().update(offer);
+    }
+
+    @Override
+    protected void updateCount(long count) {
+        offer.setCount(count);
+        store.getOfferAccessor().update(offer);
+    }
+
+    @Override
+    public Item getItem() {
+        return item;
+    }
+
+    @Override
+    public OFFER_TYPE getType() {
+        return offer.getType();
+    }
+
+    @Override
+    public Vendor getVendor() {
+        if (vendor == null){
+            vendor = store.getVendorAccessor().get(offer.getVendorId());
+        }
+        return vendor;
+    }
+
+    @Override
+    public double getPrice() {
+        return offer.getPrice();
+    }
+
+    @Override
+    public long getCount() {
+        return offer.getCount();
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/PlaceProxy.java b/core/src/main/java/ru/trader/store/berkeley/PlaceProxy.java
new file mode 100644
index 0000000..b766201
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/PlaceProxy.java
@@ -0,0 +1,79 @@
+package ru.trader.store.berkeley;
+
+import ru.trader.core.AbstractPlace;
+import ru.trader.core.Vendor;
+import ru.trader.store.berkeley.entities.BDBPlace;
+import ru.trader.store.berkeley.entities.BDBVendor;
+
+import java.util.Collection;
+
+public class PlaceProxy extends AbstractPlace {
+    private final BDBPlace place;
+    private BDBStore store;
+
+    public PlaceProxy(BDBPlace place, BDBStore store) {
+        this.place = place;
+        this.store = store;
+    }
+
+    protected long getId(){
+        return place.getId();
+    }
+
+    protected BDBPlace getEntity(){
+        return place;
+    }
+
+    @Override
+    protected Vendor createVendor(String name) {
+        return new VendorProxy(new BDBVendor(name, place.getId()), store);
+    }
+
+    @Override
+    protected void updateName(String name) {
+        place.setName(name);
+        store.getPlaceAccessor().update(place);
+    }
+
+    @Override
+    protected void updatePosition(double x, double y, double z) {
+        place.setPosition(x, y, z);
+        store.getPlaceAccessor().update(place);
+    }
+
+    @Override
+    protected void addVendor(Vendor vendor) {
+        store.getVendorAccessor().put(((VendorProxy)vendor).getEntity());
+    }
+
+    @Override
+    protected void removeVendor(Vendor vendor) {
+        store.getVendorAccessor().delete(((VendorProxy)vendor).getEntity());
+    }
+
+    @Override
+    public String getName() {
+        return place.getName();
+    }
+
+    @Override
+    public double getX() {
+        return place.getX();
+    }
+
+    @Override
+    public double getY() {
+        return place.getY();
+    }
+
+    @Override
+    public double getZ() {
+        return place.getZ();
+    }
+
+    @Override
+    public Collection<Vendor> get() {
+        return store.getVendorAccessor().getAllByPlace(place.getId());
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/VendorProxy.java b/core/src/main/java/ru/trader/store/berkeley/VendorProxy.java
new file mode 100644
index 0000000..d438d0c
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/VendorProxy.java
@@ -0,0 +1,112 @@
+package ru.trader.store.berkeley;
+
+import ru.trader.core.*;
+import ru.trader.store.berkeley.entities.BDBOffer;
+import ru.trader.store.berkeley.entities.BDBVendor;
+
+import java.util.Collection;
+
+public class VendorProxy extends AbstractVendor {
+    private final BDBVendor vendor;
+    private final BDBStore store;
+    private Place place;
+
+    public VendorProxy(BDBVendor vendor, BDBStore store) {
+        this.vendor = vendor;
+        this.store = store;
+    }
+
+    protected long getId(){
+        return vendor.getId();
+    }
+
+    protected BDBVendor getEntity(){
+        return vendor;
+    }
+
+    protected void setPlace(PlaceProxy place) {
+        vendor.setPlace(place.getId());
+        store.getVendorAccessor().update(vendor);
+        this.place = place;
+    }
+
+    @Override
+    protected Offer createOffer(OFFER_TYPE type, Item item, double price, long count) {
+        return new OfferProxy(new BDBOffer(type, ((ItemProxy)item).getId(), price, count, vendor.getId()), store);
+    }
+
+    @Override
+    protected void updateName(String name) {
+        vendor.setName(name);
+        store.getVendorAccessor().update(vendor);
+    }
+
+    @Override
+    protected void updateDistance(double distance) {
+        vendor.setDistance(distance);
+        store.getVendorAccessor().update(vendor);
+    }
+
+    @Override
+    protected void addService(SERVICE_TYPE service) {
+        vendor.add(service);
+        store.getVendorAccessor().update(vendor);
+    }
+
+    @Override
+    protected void removeService(SERVICE_TYPE service) {
+        vendor.remove(service);
+        store.getVendorAccessor().update(vendor);
+    }
+
+    @Override
+    protected void addOffer(Offer offer) {
+        OfferProxy oProxy = ((OfferProxy)offer);
+        oProxy.setVendor(this);
+        store.getOfferAccessor().put(oProxy.getEntity());
+    }
+
+    @Override
+    protected void removeOffer(Offer offer) {
+        store.getOfferAccessor().delete(((OfferProxy) offer).getEntity());
+    }
+
+
+    @Override
+    public String getName() {
+        return vendor.getName();
+    }
+
+    @Override
+    public Place getPlace() {
+        if (place == null){
+            place = store.getPlaceAccessor().get(vendor.getPlaceId());
+        }
+        return place;
+    }
+
+    @Override
+    public double getDistance() {
+        return vendor.getDistance();
+    }
+
+    @Override
+    public boolean has(SERVICE_TYPE service) {
+        return vendor.has(service);
+    }
+
+    @Override
+    public Collection<Offer> get(OFFER_TYPE type) {
+        return store.getOfferAccessor().getAllByType(vendor.getId(), type);
+    }
+
+    @Override
+    public Offer get(OFFER_TYPE type, Item item) {
+        return store.getOfferAccessor().get(vendor.getId(), type, ((ItemProxy)item).getId());
+    }
+
+    @Override
+    public boolean has(OFFER_TYPE type, Item item) {
+        return store.getOfferAccessor().has(vendor.getId(), type, ((ItemProxy)item).getId());
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/DAUtils.java b/core/src/main/java/ru/trader/store/berkeley/dao/DAUtils.java
new file mode 100644
index 0000000..c4d5045
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/DAUtils.java
@@ -0,0 +1,48 @@
+package ru.trader.store.berkeley.dao;
+
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.function.Function;
+
+import com.sleepycat.persist.EntityCursor;
+import com.sleepycat.persist.EntityIndex;
+import com.sleepycat.persist.SecondaryIndex;
+
+public class DAUtils {
+
+    public static <T, K, E> T get(EntityIndex<K, E> index, K key, Function<E, T> convertFunc){
+        return convertFunc.apply(index.get(key));
+    }
+
+    public static <T, K, E> Collection<T> get(EntityIndex<K, E> index, K from, K to, Function<E, T> convertFunc){
+        Collection<T> res = new LinkedList<>();
+        try (EntityCursor<E> cursor = index.entities(from, true, to, true)){
+            for(E entity : cursor){
+                res.add(convertFunc.apply(entity));
+            }
+        }
+        return res;
+    }
+
+    public static <T, E> Collection<T> getAll(EntityIndex<?, E> index, Function<E, T> convertFunc){
+        Collection<T> res = new LinkedList<>();
+        try (EntityCursor<E> cursor = index.entities()){
+            for(E entity : cursor){
+                res.add(convertFunc.apply(entity));
+            }
+        }
+        return res;
+    }
+
+    public static <T, K, E> Collection<T> getAll(SecondaryIndex<K, ?, E> index, K key, Function<E, T> convertFunc){
+        Collection<T> res = new LinkedList<>();
+        try (EntityCursor<E> cursor = index.subIndex(key).entities()){
+            for(E entity : cursor){
+                res.add(convertFunc.apply(entity));
+            }
+        }
+        return res;
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/GroupDA.java b/core/src/main/java/ru/trader/store/berkeley/dao/GroupDA.java
new file mode 100644
index 0000000..3dfe74c
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/GroupDA.java
@@ -0,0 +1,38 @@
+package ru.trader.store.berkeley.dao;
+
+import com.sleepycat.persist.EntityStore;
+import com.sleepycat.persist.PrimaryIndex;
+import ru.trader.store.berkeley.entities.BDBGroup;
+
+import java.util.Collection;
+import java.util.function.Function;
+
+public class GroupDA<T> {
+    private final PrimaryIndex<String, BDBGroup> indexById;
+    private final Function<BDBGroup,T> convertFunc;
+
+    public GroupDA(EntityStore store, Function<BDBGroup, T> convertFunc) {
+        this.convertFunc = convertFunc;
+        this.indexById = store.getPrimaryIndex(String.class, BDBGroup.class);
+    }
+
+    public T get(String name){
+        return DAUtils.get(indexById, name, convertFunc);
+    }
+
+    public Collection<T> getAll(){
+        return DAUtils.getAll(indexById, convertFunc);
+    }
+
+    public BDBGroup put(BDBGroup group){
+        return indexById.put(group);
+    }
+
+    public void update(BDBGroup group){
+        indexById.putNoReturn(group);
+    }
+
+    public void delete(BDBGroup group){
+        indexById.delete(group.getName());
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/ItemDA.java b/core/src/main/java/ru/trader/store/berkeley/dao/ItemDA.java
new file mode 100644
index 0000000..c468ed4
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/ItemDA.java
@@ -0,0 +1,45 @@
+package ru.trader.store.berkeley.dao;
+
+import com.sleepycat.persist.EntityStore;
+import com.sleepycat.persist.PrimaryIndex;
+import com.sleepycat.persist.SecondaryIndex;
+import ru.trader.store.berkeley.entities.BDBItem;
+
+import java.util.Collection;
+import java.util.function.Function;
+
+public class ItemDA<T> {
+    private final PrimaryIndex<Long, BDBItem> indexById;
+    private final SecondaryIndex<String, Long, BDBItem> indexByGroupId;
+    private final Function<BDBItem,T> convertFunc;
+
+    public ItemDA(EntityStore store, Function<BDBItem, T> convertFunc) {
+        this.convertFunc = convertFunc;
+        this.indexById = store.getPrimaryIndex(Long.class, BDBItem.class);
+        this.indexByGroupId = store.getSecondaryIndex(indexById, String.class, "groupId");
+    }
+
+    public T get(long id){
+        return DAUtils.get(indexById, id, convertFunc);
+    }
+
+    public Collection<T> getAll(){
+        return DAUtils.getAll(indexById, convertFunc);
+    }
+
+    public Collection<T> getAll(String group){
+        return DAUtils.getAll(indexByGroupId, group, convertFunc);
+    }
+
+    public BDBItem put(BDBItem item){
+        return indexById.put(item);
+    }
+
+    public void update(BDBItem item){
+        indexById.putNoReturn(item);
+    }
+
+    public void delete(BDBItem item){
+        indexById.delete(item.getId());
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/OfferDA.java b/core/src/main/java/ru/trader/store/berkeley/dao/OfferDA.java
new file mode 100644
index 0000000..63ac14b
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/OfferDA.java
@@ -0,0 +1,93 @@
+package ru.trader.store.berkeley.dao;
+
+import com.sleepycat.persist.*;
+import ru.trader.core.OFFER_TYPE;
+import ru.trader.store.berkeley.entities.BDBOffer;
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.function.Function;
+
+public class OfferDA<T> {
+    private final PrimaryIndex<Long, BDBOffer> indexById;
+    private final SecondaryIndex<Long, Long, BDBOffer> indexByItemId;
+    private final SecondaryIndex<Long, Long, BDBOffer> indexByVendorId;
+    private final SecondaryIndex<OFFER_TYPE, Long, BDBOffer> indexByType;
+    private final Function<BDBOffer,T> convertFunc;
+
+    public OfferDA(EntityStore store, Function<BDBOffer, T> convertFunc) {
+        this.convertFunc = convertFunc;
+        this.indexById = store.getPrimaryIndex(Long.class, BDBOffer.class);
+        this.indexByItemId = store.getSecondaryIndex(indexById, Long.class, "itemId");
+        this.indexByVendorId = store.getSecondaryIndex(indexById, Long.class, "vendorId");
+        this.indexByType = store.getSecondaryIndex(indexById, OFFER_TYPE.class, "type");
+    }
+
+    public T get(long id){
+        return DAUtils.get(indexById, id, convertFunc);
+    }
+
+    public Collection<T> getAll(){
+        return DAUtils.getAll(indexById, convertFunc);
+    }
+
+    public Collection<T> getAllByItem(long itemId){
+        return DAUtils.getAll(indexByItemId, itemId, convertFunc);
+    }
+
+    public Collection<T> getAllByVendor(long vendorId){
+        return DAUtils.getAll(indexByVendorId, vendorId, convertFunc);
+    }
+
+    public Collection<T> getAllByType(OFFER_TYPE type){
+        return DAUtils.getAll(indexByType, type, convertFunc);
+    }
+
+    public T get(long vendorId, OFFER_TYPE type, long itemId){
+        EntityJoin<Long,BDBOffer> join = new EntityJoin<>(indexById);
+        join.addCondition(indexByVendorId, vendorId);
+        join.addCondition(indexByType, type);
+        join.addCondition(indexByItemId, itemId);
+        BDBOffer entity;
+        try (ForwardCursor<BDBOffer> cursor = join.entities())
+        {
+            entity = cursor.next();
+        }
+        return entity != null ? convertFunc.apply(entity) : null;
+    }
+
+    public boolean has(long vendorId, OFFER_TYPE type, long itemId){
+        EntityJoin<Long,BDBOffer> join = new EntityJoin<>(indexById);
+        join.addCondition(indexByVendorId, vendorId);
+        join.addCondition(indexByType, type);
+        join.addCondition(indexByItemId, itemId);
+        return join.keys().next() != null;
+    }
+
+    public Collection<T> getAllByType(long vendorId, OFFER_TYPE type){
+        EntityJoin<Long,BDBOffer> join = new EntityJoin<>(indexById);
+        join.addCondition(indexByVendorId, vendorId);
+        join.addCondition(indexByType, type);
+        Collection<T> res = new LinkedList<>();
+        try (ForwardCursor<BDBOffer> cursor = join.entities())
+        {
+            for(BDBOffer entity : cursor){
+                res.add(convertFunc.apply(entity));
+            }
+        }
+        return res;
+    }
+
+
+    public BDBOffer put(BDBOffer offer){
+        return indexById.put(offer);
+    }
+
+    public void update(BDBOffer offer){
+        indexById.putNoReturn(offer);
+    }
+
+    public void delete(BDBOffer offer){
+        indexById.delete(offer.getId());
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/PlaceDA.java b/core/src/main/java/ru/trader/store/berkeley/dao/PlaceDA.java
new file mode 100644
index 0000000..24da937
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/PlaceDA.java
@@ -0,0 +1,58 @@
+package ru.trader.store.berkeley.dao;
+
+import com.sleepycat.persist.EntityCursor;
+import com.sleepycat.persist.EntityStore;
+import com.sleepycat.persist.PrimaryIndex;
+import com.sleepycat.persist.SecondaryIndex;
+import ru.trader.store.berkeley.entities.BDBPlace;
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.function.Function;
+
+public class PlaceDA<T> {
+    private final PrimaryIndex<Long, BDBPlace> indexById;
+    private final SecondaryIndex<Double, Long, BDBPlace> indexByDistance;
+    private final Function<BDBPlace,T> convertFunc;
+
+    public PlaceDA(EntityStore store, Function<BDBPlace, T> convertFunc) {
+        this.convertFunc = convertFunc;
+        this.indexById = store.getPrimaryIndex(Long.class, BDBPlace.class);
+        this.indexByDistance = store.getSecondaryIndex(indexById, Double.class, "distance");
+    }
+
+    public T get(long id){
+        return DAUtils.get(indexById, id, convertFunc);
+    }
+
+    public Collection<T> getAll(){
+        return DAUtils.getAll(indexById, convertFunc);
+    }
+
+    public Collection<T> getAll(double x, double y, double z, double radius){
+        double center = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2));
+        Collection<T> res = new LinkedList<>();
+        try (EntityCursor<BDBPlace> cursor = indexByDistance.entities(center < radius? 0 : center - radius, true, center + radius, true))
+        {
+            for(BDBPlace entity : cursor){
+                double distance = Math.sqrt(Math.pow(x - entity.getX(), 2) + Math.pow(y - entity.getY(), 2) + Math.pow(z  - entity.getZ(), 2));
+                if (distance <= radius)
+                    res.add(convertFunc.apply(entity));
+            }
+        }
+        return res;
+    }
+
+    public BDBPlace put(BDBPlace place){
+        return indexById.put(place);
+    }
+
+    public void update(BDBPlace place){
+        indexById.putNoReturn(place);
+    }
+
+    public void delete(BDBPlace place){
+        indexById.delete(place.getId());
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/dao/VendorDA.java b/core/src/main/java/ru/trader/store/berkeley/dao/VendorDA.java
new file mode 100644
index 0000000..cc0caa8
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/dao/VendorDA.java
@@ -0,0 +1,44 @@
+package ru.trader.store.berkeley.dao;
+
+import com.sleepycat.persist.*;
+import ru.trader.store.berkeley.entities.BDBVendor;
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.function.Function;
+
+public class VendorDA<T> {
+    private final PrimaryIndex<Long, BDBVendor> indexById;
+    private final SecondaryIndex<Long, Long, BDBVendor> indexByPlaceId;
+    private final Function<BDBVendor,T> convertFunc;
+
+    public VendorDA(EntityStore store, Function<BDBVendor, T> convertFunc) {
+        this.convertFunc = convertFunc;
+        this.indexById = store.getPrimaryIndex(Long.class, BDBVendor.class);
+        this.indexByPlaceId = store.getSecondaryIndex(indexById, Long.class, "placeId");
+    }
+
+    public T get(long id){
+        return DAUtils.get(indexById, id, convertFunc);
+    }
+
+    public Collection<T> getAll(){
+        return DAUtils.getAll(indexById, convertFunc);
+    }
+
+    public Collection<T> getAllByPlace(long placeId){
+        return DAUtils.getAll(indexByPlaceId, placeId, convertFunc);
+    }
+
+    public BDBVendor put(BDBVendor vendor){
+        return indexById.put(vendor);
+    }
+
+    public void update(BDBVendor vendor){
+        indexById.putNoReturn(vendor);
+    }
+
+    public void delete(BDBVendor vendor){
+        indexById.delete(vendor.getId());
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/BDBGroup.java b/core/src/main/java/ru/trader/store/berkeley/entities/BDBGroup.java
new file mode 100644
index 0000000..24192cc
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/entities/BDBGroup.java
@@ -0,0 +1,34 @@
+package ru.trader.store.berkeley.entities;
+
+import com.sleepycat.persist.model.Entity;
+import com.sleepycat.persist.model.PrimaryKey;
+import ru.trader.core.GROUP_TYPE;
+import ru.trader.core.Group;
+
+
+@Entity(version = 1)
+public class BDBGroup implements Group {
+
+    @PrimaryKey
+    private String name;
+
+    private GROUP_TYPE type;
+
+    private BDBGroup() {
+    }
+
+    public BDBGroup(String name, GROUP_TYPE type) {
+        this.name = name;
+        this.type = type;
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public GROUP_TYPE getType() {
+        return type;
+    }
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/Item.java b/core/src/main/java/ru/trader/store/berkeley/entities/BDBItem.java
similarity index 50%
rename from core/src/main/java/ru/trader/store/berkeley/entities/Item.java
rename to core/src/main/java/ru/trader/store/berkeley/entities/BDBItem.java
index 30d62e6..aeed4a0 100644
--- a/core/src/main/java/ru/trader/store/berkeley/entities/Item.java
+++ b/core/src/main/java/ru/trader/store/berkeley/entities/BDBItem.java
@@ -2,26 +2,40 @@ package ru.trader.store.berkeley.entities;
 
 import com.sleepycat.persist.model.*;
 
-@Entity
-public class Item {
+@Entity(version = 1)
+public class BDBItem {
     @PrimaryKey(sequence="I_ID")
     private long id;
 
     private String name;
 
     @SecondaryKey(relate = Relationship.MANY_TO_ONE,
-            relatedEntity = Group.class,
+            relatedEntity = BDBGroup.class,
             onRelatedEntityDelete = DeleteAction.CASCADE)
     private String groupId;
 
-    private Item() {
+    private BDBItem() {
     }
 
-    public Item(String name) {
+    public BDBItem(String name, String groupId) {
         this.name = name;
+        this.groupId = groupId;
     }
 
     public long getId() {
         return id;
     }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getGroupId() {
+        return groupId;
+    }
+
 }
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/BDBOffer.java b/core/src/main/java/ru/trader/store/berkeley/entities/BDBOffer.java
new file mode 100644
index 0000000..598afc2
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/entities/BDBOffer.java
@@ -0,0 +1,72 @@
+package ru.trader.store.berkeley.entities;
+
+import com.sleepycat.persist.model.*;
+import ru.trader.core.OFFER_TYPE;
+
+@Entity(version = 1)
+public class BDBOffer {
+
+    @PrimaryKey(sequence = "O_ID")
+    private long id;
+
+    @SecondaryKey(relate = Relationship.MANY_TO_ONE,
+            relatedEntity = BDBItem.class,
+            onRelatedEntityDelete = DeleteAction.NULLIFY)
+    private long itemId;
+
+    @SecondaryKey(relate = Relationship.MANY_TO_ONE,
+            relatedEntity = BDBVendor.class,
+            onRelatedEntityDelete = DeleteAction.NULLIFY)
+    private long vendorId;
+
+    @SecondaryKey(relate = Relationship.ONE_TO_ONE)
+    private OFFER_TYPE type;
+
+    private double price;
+    private long count;
+
+    public BDBOffer(OFFER_TYPE type, long itemId, double price, long count, long vendorId) {
+        this.type = type;
+        this.itemId = itemId;
+        this.price = price;
+        this.count = count;
+        this.vendorId = vendorId;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public OFFER_TYPE getType() {
+        return type;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public long getCount() {
+        return count;
+    }
+
+    public void setCount(long count) {
+        this.count = count;
+    }
+
+    public long getItemId() {
+        return itemId;
+    }
+
+    public long getVendorId() {
+        return vendorId;
+    }
+
+    public void setVendor(long vendorId) {
+        this.vendorId = vendorId;
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/BDBPlace.java b/core/src/main/java/ru/trader/store/berkeley/entities/BDBPlace.java
new file mode 100644
index 0000000..d78a513
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/entities/BDBPlace.java
@@ -0,0 +1,62 @@
+package ru.trader.store.berkeley.entities;
+
+import com.sleepycat.persist.model.Entity;
+import com.sleepycat.persist.model.PrimaryKey;
+import com.sleepycat.persist.model.Relationship;
+import com.sleepycat.persist.model.SecondaryKey;
+
+@Entity(version = 1)
+public class BDBPlace {
+
+    @PrimaryKey(sequence = "P_ID")
+    private long id;
+
+    @SecondaryKey(relate = Relationship.MANY_TO_ONE)
+    private double distance;
+
+    private String name;
+    private double x;
+    private double y;
+    private double z;
+
+
+    private BDBPlace() {
+    }
+
+    public BDBPlace(String name, double x, double y, double z) {
+        this.name = name;
+        setPosition(x,y,z);
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getX() {
+        return x;
+    }
+
+    public double getY() {
+        return y;
+    }
+
+    public double getZ() {
+        return z;
+    }
+
+    public void setPosition(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        this.distance = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2));
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/BDBVendor.java b/core/src/main/java/ru/trader/store/berkeley/entities/BDBVendor.java
new file mode 100644
index 0000000..05ad67f
--- /dev/null
+++ b/core/src/main/java/ru/trader/store/berkeley/entities/BDBVendor.java
@@ -0,0 +1,72 @@
+package ru.trader.store.berkeley.entities;
+
+import com.sleepycat.persist.model.*;
+import ru.trader.core.SERVICE_TYPE;
+
+import java.util.EnumSet;
+
+@Entity(version = 1)
+public class BDBVendor {
+
+    @PrimaryKey(sequence = "V_ID")
+    private long id;
+
+    @SecondaryKey(relate = Relationship.MANY_TO_ONE,
+            relatedEntity = BDBPlace.class,
+            onRelatedEntityDelete = DeleteAction.NULLIFY)
+    private long placeId;
+    private String name;
+    private double distance;
+
+    @SecondaryKey(relate=Relationship.ONE_TO_MANY)
+    EnumSet<SERVICE_TYPE> services = EnumSet.noneOf(SERVICE_TYPE.class);
+
+    private BDBVendor() {
+    }
+
+    public BDBVendor(String name, long placeId) {
+        this.name = name;
+        this.placeId = placeId;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public long getPlaceId() {
+        return placeId;
+    }
+
+    public void setPlace(long placeId){
+        this.placeId = placeId;
+    }
+
+    public double getDistance() {
+        return distance;
+    }
+
+    public void setDistance(double distance) {
+        this.distance = distance;
+    }
+
+    public void add(SERVICE_TYPE service){
+        services.add(service);
+    }
+
+    public void remove(SERVICE_TYPE service){
+        services.remove(service);
+    }
+
+    public boolean has(SERVICE_TYPE service){
+        return services.contains(service);
+    }
+
+}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/Group.java b/core/src/main/java/ru/trader/store/berkeley/entities/Group.java
deleted file mode 100644
index 87e6354..0000000
--- a/core/src/main/java/ru/trader/store/berkeley/entities/Group.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package ru.trader.store.berkeley.entities;
-
-import com.sleepycat.persist.model.Entity;
-import com.sleepycat.persist.model.PrimaryKey;
-import ru.trader.core.GROUP_TYPE;
-
-
-@Entity
-public class Group {
-    @PrimaryKey
-    private String name;
-
-    private GROUP_TYPE type;
-
-    private Group() {
-    }
-
-    public Group(String name, GROUP_TYPE type) {
-        this.name = name;
-        this.type = type;
-    }
-}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/Offer.java b/core/src/main/java/ru/trader/store/berkeley/entities/Offer.java
deleted file mode 100644
index 22cbab6..0000000
--- a/core/src/main/java/ru/trader/store/berkeley/entities/Offer.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package ru.trader.store.berkeley.entities;
-
-import com.sleepycat.persist.model.*;
-import ru.trader.core.OFFER_TYPE;
-
-@Entity
-public class Offer {
-
-    @PrimaryKey(sequence = "O_ID")
-    private long id;
-
-    @SecondaryKey(relate = Relationship.MANY_TO_ONE,
-            relatedEntity = Item.class,
-            onRelatedEntityDelete = DeleteAction.NULLIFY)
-    private long itemId;
-
-    @SecondaryKey(relate = Relationship.MANY_TO_ONE,
-            relatedEntity = Vendor.class,
-            onRelatedEntityDelete = DeleteAction.NULLIFY)
-    private long vendorId;
-
-    @SecondaryKey(relate = Relationship.ONE_TO_ONE)
-    private OFFER_TYPE type;
-
-    private double price;
-
-    public Offer(Item item, OFFER_TYPE type, double price) {
-        this.itemId = item.getId();
-        this.type = type;
-        this.price = price;
-    }
-}
diff --git a/core/src/main/java/ru/trader/store/berkeley/entities/Vendor.java b/core/src/main/java/ru/trader/store/berkeley/entities/Vendor.java
deleted file mode 100644
index 012193b..0000000
--- a/core/src/main/java/ru/trader/store/berkeley/entities/Vendor.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package ru.trader.store.berkeley.entities;
-
-import com.sleepycat.persist.model.Entity;
-import com.sleepycat.persist.model.PrimaryKey;
-import com.sleepycat.persist.model.Relationship;
-import com.sleepycat.persist.model.SecondaryKey;
-
-@Entity
-public class Vendor {
-
-    @PrimaryKey(sequence = "V_ID")
-    private long id;
-
-    private String name;
-
-    @SecondaryKey(relate = Relationship.ONE_TO_ONE)
-    private double x;
-    @SecondaryKey(relate = Relationship.ONE_TO_ONE)
-    private double y;
-    @SecondaryKey(relate = Relationship.ONE_TO_ONE)
-    private double z;
-
-    private Vendor() {
-    }
-
-    public Vendor(String name) {
-        this.name = name;
-    }
-
-    public long getId() {
-        return id;
-    }
-}