Checking reference is not initialized

core/src/main/java/mc/core/Location.java

@@ -5,7 +5,7 @@
 package mc.core;
 
 import lombok.Data;
-import mc.core.exception.ResourceUnloadException;
+import mc.core.exception.ResourceUnloadedException;
 import mc.core.world.World;
 
 import java.io.Serializable;
@@ -98,8 +98,11 @@ public class Location implements Serializable{
     }
 
     public World getWorld () {
+        if (world == null) {
+            throw new IllegalStateException("World is not initialized");
+        }
         if (world.get() == null) {
-            throw new ResourceUnloadException("You're trying to get unloaded world");
+            throw new ResourceUnloadedException("You're trying to get unloaded world");
         }
         return this.world.get();
     }

core/src/main/java/mc/core/exception/ResourceUnloadException.java

@@ -1,8 +0,0 @@
-package mc.core.exception;
-
-public class ResourceUnloadException extends McCoreUncheckedException {
-
-    public ResourceUnloadException(String msg) {
-        super(msg);
-    }
-}

core/src/main/java/mc/core/exception/ResourceUnloadedException.java

@@ -0,0 +1,8 @@
+package mc.core.exception;
+
+public class ResourceUnloadedException extends McCoreUncheckedException {
+
+    public ResourceUnloadedException(String msg) {
+        super(msg);
+    }
+}