public class Ban extends Command implements TextBase, Core
{
    public Ban()
    {
        super("ban");
        setUsage(USAGE + "/ban <nick> <powód>");
        setPermissionMessage(PERM_MODERATOR);
    }

    @Override
    public boolean execute(CommandSender sender, String s, String[] args)
    {
        if(sender instanceof Player)
        {
            Player p = (Player) sender;
            String GROUP = GettersMySQL.getPrzywilej(p);

            // Dalszy kod nie jest ważny

            return false;
         }
     }
 }