@Override
	public boolean equals(final Object obj) {

		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		final Exam other = (Exam) obj;
		if (mark == null) {
			if (other.mark != null) {
				return false;
			}
		} else if (!mark.equals(other.mark)) {
			return false;
		}
		if (name == null) {
			if (other.name != null) {
				return false;
			}
		} else if (!name.equals(other.name)) {
			return false;
		}
		return true;
	}