@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Activity other = (Activity) obj;
		if (project == null) {
			if (other.project != null)
				return false;
		} else if (!project.equals(other.project))
			return false;
		if (task == null) {
			if (other.task != null)
				return false;
		} else if (!task.equals(other.task))
			return false;
		return true;
	}