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