Interfaces being weird

Unity Engine
1

I am getting the error message

LooterAttackState' does not implement interface member State.OnStateEnter()’ and the best implementing candidate `LooterAttackState.OnStateEnter()’ in not public

for each method in my interface. I have them all implemented, and even though they are empty, they are there. Is there a reason I am getting this error? Code will be below.

State Interface

using UnityEngine;
using System.Collections;

public interface State {
	
	/// <summary>
	/// Enter the state
	/// </summary>
	void OnStateEnter();
	
	/// <summary>
	/// Things to do in this state every frame
	/// </summary>
	void Execute(NPCController npc);
	
	/// <summary>
	/// Stuff that happens when you exit the state
	/// </summary>
	void OnStateExit();
}

Class Implementing the interface:

using UnityEngine;
using System.Collections;

public class LooterAttackState : State{
	
	State previousState;
	State nextState;
	
	void OnStateEnter(){
		
	}
	
	void Execute(NPCController npc){
		//get location of player
		Vector3 playerLoc = new Vector3(0,0,0);
		Vector3 looterLoc = new Vector3(10,0,10);
		
		//get distance between the 2
		var distance = Vector3.Distance(looterLoc, playerLoc);	
		
	}
	
	void OnStateExit(){
		
	}
}
2

add public identifier on your interface methods in the class you implement them…

if i remember , you can hide it if you implement explicitly your method in interface, otherwise all your method should be public, in the class that implement them