Rever CheckpointUtilsJ9

SpigotCore/SpigotCore_Main/src/de/steamwar/core/CheckpointUtilsJ9.java

@@ -95,6 +95,9 @@ class CheckpointUtilsJ9 {
     private static void freezeInternal(Path path) throws Exception {
         Bukkit.getPluginManager().callEvent(new CRIUSleepEvent());
 
+        Bukkit.getWorlds().forEach(FlatteningWrapper.impl::syncSave);
+        Statement.closeAll();
+
         // Close socket
         Object serverConnection = TinyProtocol.getServerConnection(Core.getInstance());
         List<?> channels = channelFutures.get(serverConnection);
@@ -103,9 +106,6 @@ class CheckpointUtilsJ9 {
         }
         channels.clear();
 
-        Bukkit.getWorlds().forEach(FlatteningWrapper.impl::syncSave);
-        Statement.closeAll();
-
         System.runFinalization();
         System.gc();