You need to put in whatever you think will help the evaluator understand your design. If that includes operations and framework classes, then that's what you need.
That said... I actually don't know what to suggest if you decide to use a framework. Personally, I went with only standard Java EE technologies and did fairly well on my class diagram.
Theodore Casser
Code Poet
His brain is the size of a cherry pit! About the size of this ad: