Allowing UserID as WorldName

BauSystem_Main/src/de/steamwar/bausystem/BauSystem.java

@@ -34,13 +34,18 @@ public class BauSystem extends JavaPlugin implements Listener {
     public void onEnable() {
         plugin = this;
 
+        String worldName = Bukkit.getWorlds().get(0).getName();
         try{
-            owner = UUID.fromString(Bukkit.getWorlds().get(0).getName());
+            owner = UUID.fromString(worldName);
         }catch(IllegalArgumentException e){
+            try{
+                owner = SteamwarUser.get(Integer.parseInt(worldName)).getUUID();
+            }catch(NumberFormatException ex){
                 getLogger().log(Level.SEVERE, "owner is no UUID", e);
                 Bukkit.shutdown();
                 return;
             }
+        }
 
         try {
             CommandRemover.removeAll("tp", "gamemode", "time");