Solved set defaults custom config file error

I have this problem with custom config.yml files. I just don't seem to get it working for some reason.

I got an null pointer exception on the line:
super.options.copyDefaults(true);

I also set an commend where the error is finding place.

This cofig file always worked perfectly fine, I just don't get it why it's giving me an error

Code:

package hub.utiles;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;

import org.bukkit.configuration.InvalidConfigurationException;
import org.bukkit.configuration.file.YamlConfiguration;

import hub.Core;

public class Config extends YamlConfiguration
{
   private Core core;
   
   private File file;   
   private String saveName;
   private HashMap<String, Object> defaults;
   
   public Config(Core core, String saveName, HashMap<String, Object> defaults)
   {
     this.core = core;
     this.saveName = saveName.endsWith(".yml") ? saveName : saveName + ".yml";
     this.defaults = defaults;
     
     if(saveName.equals("") || saveName.equals(null))
        throw new IllegalArgumentException("Save name cannot be null!");
     
     file = new File(core.getDataFolder().getAbsolutePath() + File.separatorChar + saveName);
     file.getParentFile().mkdirs();

     try
     {
       if(!file.exists())
       {
         if(!file.canWrite() || file.canRead())
         {
           file.setWritable(true, false);
           file.setReadable(true, false);
         }
         
         file.createNewFile();
       }
       if(defaults != null)
       {
         super.addDefaults(defaults);
         super.options.copyDefaults(true); // this lines gives an error
         save();
       }
       load(file);
     }
     catch (IOException | InvalidConfigurationException e)
     {
       e.printStackTrace();
     }
   }
   
   public void save()
   {
     try
     {
       save(file);
     }
     catch (IOException e)
     {
       e.printStackTrace();
     }
   }
}

 

@timtower
Sorry forgot to add that, I get an null pointer exception.
To mention is that I also tried: super.addDefault("test", "test1");

But than still it's giving me an null pointer exception :/

 

@timtower
Oh I must have overlooked that, dump me ^^.

Thanks for helping!