public class Plugin extends JavaPlugin {

    private static Plugin plugin;

    @Override
    public void onLoad() {
        super.onLoad();
    }

    @Override
    public void onEnable() {
        super.onEnable();
        plugin = this;
        registerEvents();

        GameManager.copyWorld(Bukkit.getWorld("world"), "playworld");

        try {
            File file = new File("playworld");
            Bukkit.unloadWorld(file.getName(), false);
            FileUtils.deleteDirectory(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }