FindBugs checks for domain model annotations consistency.
Here is how you need to configure it:
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>findbugs-maven-plugin</artifactId>
<version>2.5.2</version>
<configuration>
<plugins>
<plugin>
<groupId>pl.itcrowd.findbugs.domain</groupId>
<artifactId>itcrowd-domain-findbugs</artifactId>
<version>1.0.0-SNAPSHOT</version>
</plugin>
</plugins>
</configuration>
</plugin>
</plugins>
</build>