Main:
package fr.energycube.uhc;

import java.io.File;

import org.bukkit.Bukkit;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.Player;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.plugin.messaging.PluginMessageListener;

import fr.energycube.uhc.Commands.Lobby;
import fr.energycube.uhc.Events.JoinEvent;
import fr.energycube.uhc.Events.MoveEvent;
import fr.energycube.uhc.Events.PlayerDeath;
import fr.energycube.uhc.Events.QuitEvent;
import fr.energycube.uhc.Runnable.GameManager;
import fr.energycube.uhc.Utils.Properties;
import fr.energycube.uhc.Utils.PlateformeUtils.LobbySpawn;


public class Main extends JavaPlugin implements PluginMessageListener{

	public SQLAPI sql;
	public static Main instance;
	public static Main getInstance(){return instance;}

	public void onEnable(){
		instance = this;
		sql = new SQLAPI("jdbc:mysql://","localhost","energycube","root","local");
		//load: STARTUP
		sql.Connection();
		sql.checkPointMiniJeu();

		this.getServer().getMessenger().registerOutgoingPluginChannel(this, "BungeeCord");
		this.getServer().getMessenger().registerIncomingPluginChannel(this, "BungeeCord", this);

		getCommand("lobby").setExecutor(new Lobby());

		System.out.println("[UHC] Activée");


		getServer().setDefaultGameMode(GameMode.SURVIVAL);
		Properties.setServerProperty(Properties.ServerProperty.HARDCORE, true);
		Properties.setServerProperty(Properties.ServerProperty.MAX_WORLD_SIZE, 2000);
		Properties.savePropertiesFile();



		PluginManager pm = getServer().getPluginManager();

		pm.registerEvents(new JoinEvent(), this);
		pm.registerEvents(new QuitEvent(), this);
		pm.registerEvents(new MoveEvent(), this);
		pm.registerEvents(new PlayerDeath(), this);

		new GameManager().runTaskTimer(this, 20, 20);


		getServer().getWorld("world").setTime(1000);
		getServer().getWorld("world").setGameRuleValue("doDaylightCycle", "false");
		generateLobby();
	}

	@Override
	public void onPluginMessageReceived(String channel, Player player, byte[] message) {
		if (!channel.equals("BungeeCord")) {

			return;
		    }
	}

	public void onDisable(){
		sql.Unconnection();
		System.out.println("Dechargement de world");
		unloadWorld(Bukkit.getWorld("world"));
		System.out.println("Dechargement de world_nether");
		unloadWorld(Bukkit.getWorld("world_nether"));
		System.out.println("Suppression de world");
		World delete = Bukkit.getWorld("world");
		if(delete != null){
			File deleteFolder = delete.getWorldFolder();
			deleteWorld(deleteFolder);
			deleteWorld(deleteFolder);
			deleteWorld(deleteFolder);
		}
		System.out.println("Suppression de world_nether");
		World deletenether = Bukkit.getWorld("world_nether");
		if(deletenether != null){
			File deleteFolder = deletenether.getWorldFolder();
			deleteWorld(deleteFolder);
			deleteWorld(deleteFolder);
			deleteWorld(deleteFolder);
		}
	}

	public boolean deleteWorld(File path) {
	      if(path.exists()) {
	          File files[] = path.listFiles();
	          for(int i=0; i<files.length; i++) {
	              if(files[i].isDirectory()) {
	                  deleteWorld(files[i]);
	                  deleteWorld(files[i]);
	              } else {
	                  files[i].delete();
	                  files[i].delete();
	                  files[i].delete();
	              }
	          }
	      }
	      return(path.delete());
	}
	public void unloadWorld(World world) {
	    Bukkit.getServer().unloadWorld(world, true);

	}

	public void generateLobby(){

		System.out.println("Suppression des blocks du lobby...");
		LobbySpawn.removeLobby(new Location(Bukkit.getWorld("world"), 0, 90, 0));
		System.out.println("Suppression des blocks du lobby : OK");
		System.out.println("Creation des du lobby...");
		LobbySpawn.spawnLobby(new Location(Bukkit.getWorld("world"), 0, 90, 0));
		System.out.println("Creation du lobby : OK");

	}



}
Lobby:
package fr.energycube.uhc.Commands;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import fr.energycube.uhc.Main;

public class Lobby implements CommandExecutor{

	@Override
	public boolean onCommand(CommandSender sender, Command cmd, String msg, String[] args) {

		if(sender instanceof Player){
			Player p = (Player) sender;
			if(cmd.getName().equalsIgnoreCase("lobby")){

				ByteArrayOutputStream b = new ByteArrayOutputStream();
			    DataOutputStream out = new DataOutputStream(b);

			    try {
			          out.writeUTF("Connect");
			          out.writeUTF("hub");
			     } catch (IOException ex) {

			     }
			     p.sendPluginMessage(Main.getInstance(), "BungeeCord", b.toByteArray());


			}


		}
		return false;
	}

}