Configuration natureAuConfig() {
   Configuration conf = ConfigManager.newConfiguration();
   conf.put("base_url", BASE_URL);
   conf.put("journal_id", "aps");
   conf.put("volume_name", "123");
   conf.put("year", "2008");
   return conf;
 }
 Configuration simAuConfig(String rootPath) {
   Configuration conf = ConfigManager.newConfiguration();
   conf.put("root", rootPath);
   conf.put("base_url", BASE_URL);
   conf.put("depth", "1");
   conf.put("branch", "4");
   conf.put("numFiles", "7");
   conf.put(
       "fileTypes",
       "" + (SimulatedContentGenerator.FILE_TYPE_HTML | SimulatedContentGenerator.FILE_TYPE_PDF));
   conf.put("binFileSize", "" + fileSize);
   return conf;
 }