Adding shutdown hooks

src/de/steamwar/bungeecore/SubserverSystem.java

@@ -30,12 +30,19 @@ public class SubserverSystem {
     public static Subserver startArena(ArenaMode modus, String map){
         int port = freePort(2500);
         String serverName = modus.getDisplayName() + (port - 2500);
-        return new Subserver(Servertype.ARENA, serverName, port,
-                MC_SCRIPT, "-a", modus.getInternalName(), serverName, Integer.toString(port), map, "0", modus.serverJar());
+
+        return new Subserver(Servertype.ARENA, serverName, port, () -> {
+            try {
+                new ProcessBuilder("rm", "-r", "~/backbone/arenaserver/" + serverName).start();
+            } catch (IOException e) {
+                throw new SecurityException("Could not clean up folder", e);
+            }
+        }, MC_SCRIPT, "-a", modus.getInternalName(), serverName, Integer.toString(port), map, "0", modus.serverJar());
     }
 
     public static Subserver startEventArena(EventFight eventFight, String serverName){
         int port = freePort(2500);
+
         return new Subserver(Servertype.ARENA, serverName, port,
                 MC_SCRIPT, "-a", eventFight.getSpielmodus().getInternalName(), serverName.replace(' ', '_') + eventFight.getStartTime().toLocalDateTime().format(EventCommand.TIME_FORMAT), Integer.toString(port), eventFight.getMap(), Integer.toString(eventFight.getFightID()), eventFight.getSpielmodus().serverJar());
     }
@@ -43,8 +50,13 @@ public class SubserverSystem {
     public static void sendToTestServer(ProxiedPlayer p, ArenaMode m, String map){
         int port = freePort(4000);
 
-        new Bauserver(p.getName() + "s Bau", p.getUniqueId(), port,
-                MC_SCRIPT, "-a", m.getInternalName(), p.getName(), Integer.toString(port), map, "-1", m.serverJar()).sendPlayer(p);
+        new Bauserver(p.getName() + "s Bau", p.getUniqueId(), port, () -> {
+            try {
+                new ProcessBuilder("rm", "-r", "~/backbone/arenaserver/" + p.getName()).start();
+            } catch (IOException e) {
+                throw new SecurityException("Could not clean up folder", e);
+            }
+        }, MC_SCRIPT, "-a", m.getInternalName(), p.getName(), Integer.toString(port), map, "-1", m.serverJar()).sendPlayer(p);
     }
 
     public static void sendToBauServer(ProxiedPlayer p, UUID owner){