public class Enrollment
{
    private final int id;
    private final int studentID;
    private final int lecturerID;
    private final int courseID;

    public Enrollment(int id, int studentID, int lecturerID, int courseID)
    {
        this.id = id;
        this.studentID = studentID;
        this.lecturerID = lecturerID;
        this.courseID = courseID;
    }
}