package hp;
import net.minecraftforge.common.event.FMLPreInitializationEvent
import net.minecraftforge.common.event.FMLInitializationEvent
import net.minecraftforge.common.event.FMLPostInitializationEvent

public class mod_hp {
  public void preInit(FMLPreInitializationEvent e) {
  
  }
   public void init(FMLInitializationEvent e) {
  
  }
   public void postInit(FMLPostInitializationEvent e) {
  
  }
}

Create mod_hp.java