code: public File getConfigDirectory() {
          String dirName = getConfigDir();
          File answer = null;
          if (Strings.isNotBlank(dirName)) {
              answer = new File(dirName);
          } else {
              answer = new File(".hawtio");
          }
          answer.mkdirs();
          return answer;
      }
docs: Returns the configuration directory; lazily attempting to create it if it does not yet exist