How to properly design interface

I have two classes. Let's call them PostClass and CommentClass. Both classes implement the Reportable interface:

public interface Reportable {

    void report();

    boolean isReported();

    . . .

Now I need to add two additional methods to each one of the classes. These methods logically fit into the same interface but needs to have different names. For example:

PostClass will have methods -> remove(), restore()

CommentClass will have methods -> hide(), show()

Question: What would be the preferred way to design this change? The options are as I see it:

1. Create an additional interface which will extend the Reportable interface. Problem: Too many interfaces
2. Add all four new methods into the Reportable interface and then just leave the irrelevant two methods unimplemented in each class. Problem: Untidy/ugly