Problem reverse engineering a Java interface into a class diagram

Hi - I’m having a bit of a problem reversing my java code into a class diagram with interfaces.

If I’ve created an interface something like this:

public interface {
void method1 ();
int getAge ();

Visual paradigm builds the interface but seems to look at the getAge method and assume that there must be a instance variable which it adds to the interface…Here’s the problem, an interface shouldn’t have instance variables in it! Is there a way that I can just literally transpose my methods interfaces and classes without VP trying to massage it?