Add the following fragment to your pom file to execute the one plugin as part of the "generate-resources" phase.
<project>
...
<build>
<plugins>
<plugin>
<groupId>org.freehep</groupId>
<artifactId>freehep-one-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>generate-dependencies</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
...
</project>