public class Main extends JavaPlugin implements Listener{

    static FileConfiguration config;

    public void onEnable()
    {
        config = getConfig();
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
    }

    public boolean onCommand(CommandSender sender, Command command, String label, String[] args)
    {
        Player player = (Player) sender;

        if( command.getName().equalsIgnoreCase("rtp") )
        {
            if( args != null && args[1].equals("pos") )
            {
                if( player.isOp() || player.hasPermission("rubukkit.admin") )
                {
                    //config.set("", arg1);
                }
            }
        }

        return true;
    }
}