<!-- Although you can use the "JavadocStyle" rule for this, it considers Javadoc -->
  <!-- that only contains a "@return" line to be empty. -->
  <module name="RegexpMultiline">
    <property name="id" value="EmptyJavadoc" />
    <property name="format" value="\/\*[\s\*]*\*\/" />
    <property name="fileExtensions" value="java" />
    <property name="message" value="Empty javadoc comments are forbidden" />
  </module>

  <!--