java different_Java cannot be inherited with different arguments

I'm having trouble actually inheriting the interface. I keep ending up with the error

error: NameableContainer cannot be inherited with different arguments: < Friend> and <>

I have the following interfaces:

public interface Nameable

public interface Name

public interface Friend extends Nameable

public interface NameableContainer {

void add(Name name, Name prevName);

void remove(Nameable nameable);

T findByName(Name name);

}

public interface FriendContainer extends NameableContainer

I also have an abstract class that inherits NameableContainer.

public abstract class NameableMap implements NameableContainer {

public void add(Name name, Name prevName) { /* do stuff*/ }

public void remove(Nameable nameable) { /* do stuff*/ }

public Nameable findByName(Name name) { /* do stuff*/ }

}

And finally, trying to put these all together

public class Friends extends NameableMap implements FriendContainer

What am I missing?