private static void saveAppFirstInstallInfo(Context context) {
        try {
            outputStream = context.openFileOutput(Constants.FILE_WITH_APP_INSTALL_INFO, 0);
            PrintWriter printWriter = new PrintWriter(outputStream);
            printWriter.println("7.4.2");
            printWriter.flush();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }