public static void openStream() {
		String filePath = System.getProperty("user.dir") + System.getProperty("file.separator") + "results.txt";
		File file = new File(filePath);
		 
		try {
		// if file doesnt exists, then create it
			if (!file.exists()) {
				file.createNewFile();
			}
	
			FileWriter fw = new FileWriter(file.getAbsoluteFile());
			bw = new BufferedWriter(fw);
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}