public synchronized void addUnsearchList(String url){
		String filename = unarchedSitesFilePath;
		try{
			BufferedReader in = new BufferedReader(new FileReader(filename));
			String tmpFileName = filename + ".tmp";
			BufferedWriter bw = new BufferedWriter(new FileWriter(tmpFileName));
			String line = "";
			while((line = in.readLine()) != null){
				bw.write(line + "\r\n");
			}
			
			bw.write(url);
			in.close();
			bw.close();
			FileUtils.delete(filename);
			FileUtils.rename(tmpFileName , filename);
		}catch (Exception ex){
			System.out.println(ex);
		}
	}