private void endDiskDir() {
    StringBuilder dirName = (StringBuilder) stack.pop();
    File dir = new File(dirName.toString().trim());
    if (!dir.exists()) {

    }
    stack.push(dir);
  }
When a <code>disk-dir</code> element is finished, the name of the directory is on top of the
stack. Create a new {@link File}and push it on the stack.
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/CacheXmlParser.java