Shutdown Server when Empty

src/de/steamwar/towerrun/listener/GlobalListener.java

@@ -24,6 +24,7 @@ import de.steamwar.towerrun.game.TowerRunGame;
 import de.steamwar.towerrun.game.TowerRunPlayer;
 import de.steamwar.towerrun.state.GameStateBukkitListener;
 import de.steamwar.towerrun.state.GameStates;
+import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.player.PlayerJoinEvent;
@@ -48,6 +49,10 @@ public class GlobalListener extends GameStateBukkitListener {
             TowerRunGame.remove(TowerRunPlayer.get(event.getPlayer()));
         }
         TowerRunPlayer.remove(event.getPlayer());
+
+        if(Bukkit.getOnlinePlayers().isEmpty() || (Bukkit.getOnlinePlayers().size() == 1 && Bukkit.getOnlinePlayers().stream().allMatch(player -> player == event.getPlayer()))) {
+            Bukkit.shutdown();
+        }
     }
 
     @EventHandler