create PlayerManager static class

src/engine/net/client/handlers/ArcLoginNotifyMsgHandler.java

@@ -53,7 +53,7 @@ public class ArcLoginNotifyMsgHandler extends AbstractClientMsgHandler {
             GroupManager.RefreshOthersGroupList(player);
         }
 
-        player.setEnteredWorld(true);
+        PlayerManager.setEnteredWorld(player, true);
         // Set player active
         player.resetRegenUpdateTime();
         player.setActive(true);