Solved yml.createNewFile(); do not work

Im trying to make a playerdata file but
yml.createNewFile(); doesnt work Code:

Code (Text):

package events;

import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerChatEvent;
import org.bukkit.event.player.PlayerJoinEvent;

import java.io.File;
import java.io.FileOutputStream;
import java.nio.file.Files;

public class PlayerData implements Listener {
    @EventHandler(priority = EventPriority.HIGHEST)
    void onJoinEvent(PlayerJoinEvent event){
        Player player = event.getPlayer();
        File folder = new File("plugins/Carstergames", "PlayerData");
        if(!folder.exists()) {
            folder.mkdirs();

    }
        File yml = new File(folder, player.getPlayerListName() + ".yml");
        if(!yml.exists()) {
            yml.createNewFile();
        }

}


}