Refactored assignment.

src/engine/objects/Building.java

@@ -967,19 +967,8 @@ public class Building extends AbstractWorldObject {
 
         // Reference friend and condemn lists from BuildingManager
 
-        this.friends = BuildingManager._buildingFriends.get(this.getObjectUUID());
-
-        if (this.friends == null) {
-            this.friends = new ConcurrentHashMap<>();
-            BuildingManager._buildingFriends.put(this.getObjectUUID(), this.friends);
-        }
-
-        this.condemned = BuildingManager._buildingCondemned.get(this.getObjectUUID());
-
-        if (this.condemned == null) {
-            this.condemned = new ConcurrentHashMap<>();
-            BuildingManager._buildingCondemned.put(this.getObjectUUID(), this.condemned);
-        }
+        this.friends = BuildingManager._buildingFriends.computeIfAbsent(this.getObjectUUID(), k -> new ConcurrentHashMap<>());
+        this.condemned = BuildingManager._buildingCondemned.computeIfAbsent(this.getObjectUUID(), k -> new ConcurrentHashMap<>());
 
         //LOad Owners in Cache so we do not have to continuely look in the db for owner.