I think you're going to want to redo this when you become more familiar with Hibernate. Relationships between objects are useful in Hibernate especially when it comes to writing queries that are more than findById.
The best place to start is either by reading the documentation and examples at (Hibernate Reference
) or by reading Hibernate in Action.
And do the examples because that is the best way to see it working properly.
Also, if you've got specific questions when you start putting your relationships back in - just post on the forums.