I'm posting here because I need some help at the 3rd exercise.
My problem is that when I try to persit my data, or to perform any kind of operation on the database, by using the EntityManager variable I get a nullPointerException. I tryed a lot of things in order to solve it, but I'm still stucked. I would really apreciate if you can give me a hint or something...
...as information-I have only annotated my model classes and then I used the EntityManager variable where was needed to operate with the database. Should I use a SQL File, or is there something additional that I miss? should I create the database separately?
Thanks in advance!