intento de saveworld data

[perromercenary00]

package mercenary00.mercenarymod.utilidades;

import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.world.WorldSavedData;

public class datosMercenarios extends WorldSavedData
{
private NBTTagCompound data = new NBTTagCompound();

public datosMercenarios(String tagName) {
    super(tagName);
}


@Override
public void readFromNBT(NBTTagCompound compound) {
 data = compound.getCompoundTag("mercenario");
}

@Override
public void writeToNBT(NBTTagCompound compound) {
    compound.setTag("mercenario", data);
}

public NBTTagCompound getData() {
    return data;
}

}