Experiences with Maven 3: Generating reports
After installing version 3 of Maven I missed the generation of the documentation site. While the documentation claims no changes to POM files are necessary to use the newer version it doesn't behave the same.
Version 3 accepts the same POM files used with version 2, but the site goal no longer generates any output. This is because of a change in the POM structure. The configuration of reports has moved from a separate <reporting> section to the <build> section:
<build>
<plugins>
...
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-site-plugin</artifactId>
<version>3.0-beta-3</version>
<configuration>
<reportPlugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.4</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.8</version>
<configuration>
<quiet>true</quiet>
</configuration>
</plugin>
</reportPlugins>
</configuration>
</plugin>
...
</plugins>
</build>
To generate the general project information reports you automatically get with Maven 2, add the maven-project-info-reports-plugin.