[SOLVED] How do I get a Java maven build to fail for compiler warnings?

How do I get a Java maven build to fail for compiler warnings?

I am trying:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <compilerArgument>-Werror</compilerArgument>
                <fork>true</fork>
            </configuration>
        </plugin>

but with no joy. Any ideas now to get medieval on such errors as suggested at this blog post?

Solution

EDIT: This answer is outdated however I can't delete it as it was an accepted answer at the time.

This a bug with Maven see: https://issues.apache.org/jira/browse/MCOMPILER-120 it's been fixed in 2.4 of the Maven-compiler-plugin but I don't believe that's been released yet. tag won't work either unfortunately.