In Eclipse 4.2, I am able to create an EJB project with a client jar project. When I then create a new EJB 3.0 session bean in the EJB project, it correctly places the implementation in the EJB project and the interface in the Client jar project.
I tried to mimic this in MyEclipse 2013 without success. I was able to get the projects created and set up correctly, though when I create a new EJB, it puts both files in the EJB project.