diff --git a/src/main/java/ru/di9/mirror/services/FileStorageService.java b/src/main/java/ru/di9/mirror/services/FileStorageService.java
new file mode 100644
index 0000000..b31fe8c
--- /dev/null
+++ b/src/main/java/ru/di9/mirror/services/FileStorageService.java
@@ -0,0 +1,114 @@
+package ru.di9.mirror.services;
+
+import org.springframework.stereotype.Service;
+import ru.di9.mirror.Utils;
+import ru.di9.mirror.config.MavenConfig;
+import ru.di9.mirror.domain.FileRecord;
+import ru.di9.mirror.domain.PathRecord;
+import ru.di9.mirror.domain.PathType;
+import ru.di9.mirror.domain.WalkerResult;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+@Service
+public class FileStorageService implements StorageService {
+
+    private final MavenConfig config;
+
+    public FileStorageService(MavenConfig config) {
+        this.config = config;
+    }
+
+    @SuppressWarnings("java:S112")
+    @Override
+    public Optional<FileRecord> getFile(String path) {
+        Path fullPath = storageResolve(path);
+
+        if (Files.notExists(fullPath)) {
+            return Optional.empty();
+        }
+
+        try {
+            return Optional.of(new FileRecord(
+                    fullPath.toFile().getName(),
+                    Files.size(fullPath),
+                    Files.newInputStream(fullPath)
+            ));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @SuppressWarnings("java:S112")
+    @Override
+    public void putFile(String path, InputStream inputStream) {
+        Path fullPath = storageResolve(path);
+        try {
+            Files.createDirectories(fullPath.getParent());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        try (OutputStream outputStream = Files.newOutputStream(fullPath)) {
+            byte[] buff = new byte[8 * 1024];
+            int len;
+            while ((len = inputStream.read(buff)) > 0) {
+                outputStream.write(buff, 0, len);
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @SuppressWarnings("java:S112")
+    @Override
+    public Optional<WalkerResult> walker(String path) {
+        Path fullPath = storageResolve(path);
+
+        if (Files.notExists(fullPath)) {
+            return Optional.empty();
+        }
+
+        if (Files.isDirectory(fullPath)) {
+            final List<PathRecord> list = new ArrayList<>();
+
+            try (Stream<Path> walk = Files.walk(fullPath, 1)) {
+                walk.skip(1).forEach(path1 -> list.add(new PathRecord(
+                        path1.getFileName().toString(),
+                        Files.isDirectory(path1) ? PathType.DIRECTORY : PathType.FILE)));
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+
+            return Optional.of(new WalkerResult(PathType.DIRECTORY, null, list));
+        } else {
+            try {
+                var fileRecord = new FileRecord(
+                        fullPath.getFileName().toString(),
+                        Files.size(fullPath),
+                        Files.newInputStream(fullPath)
+                );
+
+                return Optional.of(new WalkerResult(PathType.FILE, fileRecord, null));
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    private Path storageResolve(String httpPath) {
+        if (Utils.isEmptyString(httpPath)) {
+            return config.getStoragePath();
+        } else {
+            return config.getStoragePath().resolve(httpPath.substring(1));
+        }
+    }
+}
diff --git a/src/main/java/ru/di9/mirror/services/StorageService.java b/src/main/java/ru/di9/mirror/services/StorageService.java
index c3065ce..640d6b7 100644
--- a/src/main/java/ru/di9/mirror/services/StorageService.java
+++ b/src/main/java/ru/di9/mirror/services/StorageService.java
@@ -1,112 +1,16 @@
 package ru.di9.mirror.services;
 
-import org.springframework.stereotype.Service;
-import ru.di9.mirror.Utils;
-import ru.di9.mirror.config.MavenConfig;
 import ru.di9.mirror.domain.FileRecord;
-import ru.di9.mirror.domain.PathRecord;
-import ru.di9.mirror.domain.PathType;
 import ru.di9.mirror.domain.WalkerResult;
 
-import java.io.IOException;
 import java.io.InputStream;
-import java.io.OutputStream;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Optional;
-import java.util.stream.Stream;
 
-@SuppressWarnings("ClassCanBeRecord")
-@Service
-public class StorageService {
+public interface StorageService {
 
-    private final MavenConfig config;
+    Optional<FileRecord> getFile(String path);
 
-    public StorageService(MavenConfig config) {
-        this.config = config;
-    }
+    void putFile(String path, InputStream inputStream);
 
-    @SuppressWarnings("java:S112")
-    public Optional<FileRecord> getFile(String path) {
-        Path fullPath = storageResolve(path);
-
-        if (Files.notExists(fullPath)) {
-            return Optional.empty();
-        }
-
-        try {
-            return Optional.of(new FileRecord(
-                    fullPath.toFile().getName(),
-                    Files.size(fullPath),
-                    Files.newInputStream(fullPath)
-            ));
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    @SuppressWarnings("java:S112")
-    public void putFile(String path, InputStream inputStream) {
-        Path fullPath = storageResolve(path);
-        try {
-            Files.createDirectories(fullPath.getParent());
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-
-        try (OutputStream outputStream = Files.newOutputStream(fullPath)) {
-            byte[] buff = new byte[8 * 1024];
-            int len;
-            while ((len = inputStream.read(buff)) > 0) {
-                outputStream.write(buff, 0, len);
-            }
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    @SuppressWarnings("java:S112")
-    public Optional<WalkerResult> walker(String path) {
-        Path fullPath = storageResolve(path);
-
-        if (Files.notExists(fullPath)) {
-            return Optional.empty();
-        }
-
-        if (Files.isDirectory(fullPath)) {
-            final List<PathRecord> list = new ArrayList<>();
-
-            try (Stream<Path> walk = Files.walk(fullPath, 1)) {
-                walk.skip(1).forEach(path1 -> list.add(new PathRecord(
-                        path1.getFileName().toString(),
-                        Files.isDirectory(path1) ? PathType.DIRECTORY : PathType.FILE)));
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-
-            return Optional.of(new WalkerResult(PathType.DIRECTORY, null, list));
-        } else {
-            try {
-                var filreRecord = new FileRecord(
-                        fullPath.getFileName().toString(),
-                        Files.size(fullPath),
-                        Files.newInputStream(fullPath)
-                );
-
-                return Optional.of(new WalkerResult(PathType.FILE, filreRecord, null));
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-        }
-    }
-
-    private Path storageResolve(String httpPath) {
-        if (Utils.isEmptyString(httpPath)) {
-            return config.getStoragePath();
-        } else {
-            return config.getStoragePath().resolve(httpPath.substring(1));
-        }
-    }
+    Optional<WalkerResult> walker(String path);
 }