code: public static void main(String... args) {
          try {
              Backtrack b = new Backtrack(args);
              b.end();
          } catch (MalformedURLException e) {
              e.printStackTrace();
          } catch (SAXException e) {
              e.printStackTrace();
          } catch (IOException e) {
              e.printStackTrace();
          } catch (URISyntaxException e) {
              e.printStackTrace();
          } catch (JAXBException e) {
              e.printStackTrace();
          }
      }
docs: Backtrack {@code main()}.
  
  @param args Command-line arguments