@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (!(obj instanceof Attachment))
			return false;
		Attachment other = (Attachment) obj;
		if (fileName == null) {
			if (other.fileName != null)
				return false;
		} else if (!fileName.equals(other.fileName))
			return false;
		return true;
	}