pom.xml

<plugin>
  <groupId>org.walkmod.maven.plugins</groupId>
  <artifactId>walkmod-maven-plugin</artifactId>
  <version>2.0.1</version>
  <executions>
    <execution>
      <goals>
        <goal>patch</goal>
      </goals>
      <configuration>
        <chains>pmd</chains>
        <properties>configurationFile=src/main/resources/ruleset.xml</properties>
      </configuration>
    </execution>
  </executions>
</plugin>