code: public static JpaModule newServerModule(EntityManagerFactory emFactory, EntityManager em, TransactionRunner transactionRunner) {
  		return new JpaModule(emFactory, em, transactionRunner);
  	}
docs: Creates a new JpaModule for a Katharsis server. All entities managed by
  the provided EntityManagerFactory are registered to the module and
  exposed as JSON API resources if not later configured otherwise.
  
  @param emFactory
  to retrieve the managed entities.
  @param em
  to use
  @param transactionRunner
  to use
  @return created module