Save movies with many to many relationship to actors

Main.java

// Define Harrison Ford Actor
Actor harrisonFordActor = new Actor();
harrisonFordActor.setFirstName("Harrison");
harrisonFordActor.setLastName("Ford");

// Define Mark Hamill Actor
Actor markHamillActor = new Actor();
markHamillActor.setFirstName("Mark");
markHamillActor.setLastName("Hamill");

// Create Star Wars Movie
Movie starWarsMovie = new Movie();
starWarsMovie.setTitle("A New Hope");

// Create Indiana Jones Movie
Movie indianaJonesMovie = new Movie();
indianaJonesMovie.setTitle("Raiders of the Lost Ark");

// Set relationship for Star Wars Movie to its actors
List<Actor> starWarsActors = new ArrayList<>();
starWarsActors.add(harrisonFordActor);
starWarsActors.add(markHamillActor);
starWarsMovie.setActors(starWarsActors);

// Set relationship for Star Wars Movie to its actors
List<Actor> indianaJonesActors = new ArrayList<>();
indianaJonesActors.add(harrisonFordActor);
indianaJonesMovie.setActors(indianaJonesActors);

// Optional.  You do not need to set the inverse relationships
/*
List<Movie> harrisonFordsMovies = new ArrayList<>();
harrisonFordsMovies.add(starWarsMovie);
harrisonFordsMovies.add(indianaJonesMovie);
harrisonFordActor.setMovies(harrisonFordsMovies);

List<Movie> markHamillMovies = new ArrayList<>();
markHamillMovies.add(starWarsMovie);
markHamillActor.setMovies(markHamillMovies);
*/

// Persist the movies
persistenceManager.saveEntity(starWarsMovie);
persistenceManager.saveEntity(indianaJonesMovie);