To configure the generation of the documentation reports, add the following to the project's POM:
<project>
...
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-plugin-plugin</artifactId>
<version>3.0</version>
</plugin>
</plugins>
...
</reporting>
...
</project>The documentation is generated by default in ${project.build.directory}/site.