Test schedule sync shutdown

BauSystem_Main/src/de/steamwar/bausystem/features/world/AutoShutdownListener.java

@@ -65,20 +65,24 @@ public class AutoShutdownListener implements Listener {
                 @Override
                 public void run() {
                     if (count >= 300) {
-                        Bukkit.shutdown();
+                        scheduleSyncShutdown();
                         return;
                     }
                     try {
                         if (RamUsage.getUsage() > 0.8) {
-                            Bukkit.shutdown();
+                            scheduleSyncShutdown();
                         }
                     } catch (Throwable throwable) {
                         Bukkit.getLogger().log(Level.WARNING, throwable.getMessage(), throwable);
-                        Bukkit.shutdown();
+                        scheduleSyncShutdown();
                     }
                     count++;
                 }
             }, 20, 20);
         }
     }
+
+    private void scheduleSyncShutdown() {
+        Bukkit.getScheduler().runTask(BauSystem.getInstance(), Bukkit::shutdown);
+    }
 }