public class WMFLMain extends JavaPlugin implements Listener {

    private File configFile = new File(getDataFolder() + File.separator, "config.yml");
    private FileConfiguration config = YamlConfiguration.loadConfiguration(configFile);

    private Map<String, String> map = new TreeMap<String, String>();

    private String defaultMsg = "Welcome %PLAYER% on server.";

    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
        try {
            loadConfiguration();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void loadConfiguration() throws IOException {
        config.addDefault("defaultMsg", defaultMsg);
        config.addDefault("lliyt.msg", "Welcome dno :)");
        config.options().copyDefaults(true);
        config.save(configFile);
        defaultMsg = config.getString("defaultMsg");
        for (String key : config.getKeys(false)) {
            map.put(key.toLowerCase(), config.getString(key + ".msg"));
        }
    }

    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        String playerName = event.getPlayer().getDisplayName();
        event.setJoinMessage(defaultMsg.replaceAll("%PLAYER%", playerName));
        if (map.containsKey(playerName.toLowerCase())) {
            event.getPlayer().sendMessage(map.get(playerName.toLowerCase()).replaceAll("%PLAYER%", playerName).replaceAll("&([0-9a-f])", "\u00A7$1"));
        }
    }
}