plugin.yml

name: DDPomocConf
version: 0.1
main: me.ddziekan.ddpomocconfig
author: DDziekan

main

package me.ddziekan.ddpomocconfig;

import java.io.File;
import java.io.IOException;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener{

	private static Main inst;

	public Main(){
		inst = this;
	}

	public void onEnable() {
		FileManager.checkFiles();
		Bukkit.getPluginManager().registerEvents(this, this);
	}

	public void onDisable(){}

	public static Main getInst() {
		return inst;
	}

	@EventHandler
	public void onJoin(PlayerJoinEvent e) throws IOException{
		File f;
		if(FileManager.getPFile(e.getPlayer()) == null){
			f = new File(FileManager.getUsersFolder(), e.getPlayer().getName() + ".yml");
			f.createNewFile();
		} else{
			f = FileManager.getPFile(e.getPlayer());
		}
		YamlConfiguration fYml = YamlConfiguration.loadConfiguration(f);
		fYml.set("name", e.getPlayer().getName());
		fYml.set("uuid", e.getPlayer().getUniqueId().toString());
		fYml.set("ip", e.getPlayer().getAddress().getAddress().toString().replace("/", ""));
		fYml.save(f);
		e.getPlayer().sendMessage(ChatColor.translateAlternateColorCodes('&', FileManager.getMsg().getString("helloMsg")));
	}
}

filemanager

package me.ddziekan.ddpomocconfig;

import java.io.File;

import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;

public class FileManager {

	private static YamlConfiguration msg;
	private static File users = new File(Main.getInst().getDataFolder(), "users");

	public static void checkFiles(){
		if(!Main.getInst().getDataFolder().exists()){
			Main.getInst().getDataFolder().mkdir();
		}
		if(!new File(Main.getInst().getDataFolder(), "config.yml").exists()){
			Main.getInst().saveDefaultConfig();
		}
		File m = new File(Main.getInst().getDataFolder(), "messages.yml");
		if(!m.exists()){
			Main.getInst().saveResource("messages.yml", true);
		}
		if(!users.exists()){
			users.mkdir();
		}
		msg = YamlConfiguration.loadConfiguration(m);
	}

	public static YamlConfiguration getMsg(){
		return msg;
	}

	public static File getPFile(Player p){
		File f = new File(users, p.getName() + ".yml");
		if(!f.exists()) return null;
		return f;
	}

	public static File getUsersFolder(){
		return users;
	}
}

messages.yml

#==========<Configuracja wiadomosci>==========
helloMsg: '&4Witamy na ProHC.PL'