code: public static boolean start(final String configurationFilename) {
          try {
              if (getPm() == null) {
                  instance = new PresentationManager(configurationFilename);
              }
              return isActive();
          } catch (Exception ex) {
              instance = null;
              Logger.getRootLogger().fatal("Unable to initialize jPM", ex);
              return false;
          }
      }
docs: Initialize the Presentation Manager singleton
  
  @param configurationFilename File name for a configuration file
  @param log a PrintStream for logs
  
  @return true if initialization was success, false otherwies