org.linkedin.util-core/src/main/java/org/linkedin/util/xml/XML.java
@Override
  public void addEmptyTag(String tagName, Map attributes)
  {
    _xml.append('<').append(tagName);
    addAttributes(attributes);
    _xml.append(" />");
  }
@Override
  public void addEmptyTag(String tagName, Map attributes)
  {
    _xml.append('<').append(tagName);
    addAttributes(attributes);
    _xml.append(" />");
  }
Adds an empty tag which contains the attributes specified. All the
properties will be turned into attributes.

@param tagName the name of the empty tag to add
@param attributes the attributes