Profesor profesor=new Profesor(7, "Sara", "Barrrera", "Salas");
Set<CorreoElectronico> correosElectronicos=new HashSet<>();
correosElectronicos.add(new CorreoElectronico(3, "sara@yahoo.com",profesor));
correosElectronicos.add(new CorreoElectronico(2, "sara@hotmail.com",profesor));
correosElectronicos.add(new CorreoElectronico(1, "sara@gmail.com",profesor));

profesor.setCorreosElectronicos(correosElectronicos);

Session session=sessionFactory.openSession();
session.beginTransaction();

session.save(profesor);


session.getTransaction().commit();
session.close();