final FileWriter writer = new FileWriter(DIMENSION_FILE);
    final XmlObjectWriter xmlWriter = new XmlObjectWriter();
    final AliasMap aliasMap = new AliasMap();
    aliasMap.put(ArrayList.class, "images");
    xmlWriter.setAliasMap(aliasMap);
    final String xml = xmlWriter.writeToXml(dimensions, true);
    writer.append(XmlHelper.XML_HEADER);
    writer.append(xml);
    IOUtils.closeQuietly(writer);
    log.info("Creation of dimension file done: " + DIMENSION_FILE);
  }