private void writeReportFile() throws IOException {
    ReportParams params = new ReportParams();
    params.setSource(tempDir + "/output_merge.xml");
    params.setOutput(xmlout);

    params.alias(xstream);

    String xmlContents = xstream.toXML(params);
    FileUtils.write(new File(tempDir, "dotcover_report.xml"), xmlContents);
  }