code: public void initHtmlParts() {
  
          if (m_htmlProps != null) {
              // html already initialized
              return;
          }
          try {
              m_htmlProps = new Properties();
              m_htmlProps.load(getClass().getClassLoader().getResourceAsStream(HTML_MESSAGE_FILE));
          } catch (Exception e) {
              e.printStackTrace();
              m_errors.add(e.toString());
          }
      }
docs: This method reads the properties from the htmlmsg.property file
  and sets the HTML part properties with the matching values.<p>