How design pattern is this ?

I need help. I am searching on the internet how to call design pattern for my code but I haven't found it. I have a class (f.e. exercise) with getter and setter and manager which have all exercise (in the DB or array, doesn't matter). In my application, I have the one instance of exercise manager and I work with exercises through it.

Exercise :

public class Exercise {
    private Long id;
    private String name;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
}

Exercise manager:

public interface ExerciseManager{
    void createExercise(Exercise exercise);

    Dragon getExerciseById(Long id);

    Collection<Exercise> getAllExercises();

    Exercise getExerciseByName(String name);

    void updateExercise(Exercise exercise);

    void deleteExercise(Long id);

    Boolean isIdInDB(Long id);
}

public class ExerciseManagerImpl implements ExerciseManager{
    ...
}

Main (f.e.):

public static void main(String[] args) {
    DataSource dataSource = <some datasource>;
    ExerciseManager exerciseManager = new ExerciseManagerImpl(dataSource);
    Exercise newExercise = new Exercise();
    newExercise.setName("Name1");
    exerciseManager.createExercise(newExercise);
    Exercise existExercise = exerciseManager.getExerciseByName("Name1");
    exerciseManager.deleteExercise(existExercise.getId());
}