Permissions - Bukkit Coding Episode 5

package me.TheBmanSwan.Configuration;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.permissions.Permission;
import org.bukkit.plugin.java.JavaPlugin;

public class Configuration extends JavaPlugin implements Listener {

    Permission perm = new Permission("motd.set");

    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
        Bukkit.getPluginManager().addPermission(perm);
        getConfig().options().copyDefaults(true);
        saveConfig();
    }

    @EventHandler
    public void onJoin(PlayerJoinEvent e) {
        Player p = e.getPlayer();
        if (getConfig().getString("motd") == null) return;
        p.sendMessage(ChatColor.translateAlternateColorCodes('&', getConfig().getString("motd")));
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (sender.hasPermission(perm)) {
            if (label.equalsIgnoreCase("setmotd")) {
                if (args.length == 0) {
                    sender.sendMessage(ChatColor.RED + "Usage: /setmotd [motd]");
                    /**
                     * /setmotd hi im cool
                     */
                    return true;
                }
                StringBuilder x = new StringBuilder();
                for (int i = 0; i < args.length; i++) {
                    x.append(args[i] + " ");
                }
                /**
                 * motd: '&7This is an motd.'
                 */
                getConfig().set("motd", x.toString().trim());
                saveConfig();
                sender.sendMessage(ChatColor.GREEN + "Successfully set the motd to: " + ChatColor.translateAlternateColorCodes('&', getConfig().getString("motd")));
            }
        } else {
            sender.sendMessage(ChatColor.RED+"You do not have permission to execute this command.");
        }

        if (label.equalsIgnoreCase("motd")) {
            sender.sendMessage(ChatColor.translateAlternateColorCodes('&', getConfig().getString("motd")));
        }

        return true;
    }
}