public Conference(
final Date the_deadline_submission,
final Date the_deadline_review,
final Date the_deadline_decision) {
// Initialize each Role with an empty Set of Users.
for (Role r : Role.values()) {
my_roles.put(r, new HashSet<User>());
}
setDeadlineSubmission(the_deadline_submission);
my_deadline_review = the_deadline_review;
my_deadline_decision = the_deadline_decision;
}
