code: private void extractFiles(ArtifactMetadata artifactMetadata) throws RepositoryArchiveIOException, RepositoryArchiveEntryNotFoundException, RepositoryArchiveException {
  
          _readmePayload = artifactMetadata.getFileWithExtension(".txt");
          if (_readmePayload == null) {
              throw new RepositoryArchiveEntryNotFoundException("Unable to find iFix readme .txt file in archive"
                                                                + artifactMetadata.getArchive().getAbsolutePath(), artifactMetadata.getArchive(), "*.txt");
          }
  
      }
docs: Extract the files from the zip
  
  @param zip
  @throws RepositoryArchiveIOException
  @throws RepositoryArchiveException
  @throws RepositoryArchiveEntryNotFoundException