generateStubs generates stubs without original Javadocs or annotations

When running

<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.2</version>
<executions>
<execution>
<id>generate-stubs</id>
<phase>generate-sources</phase>
<goals>
<goal>generateStubs</goal>
</goals>
<configuration>
<providerSelection>1.7</providerSelection>
<sources>
<fileset>
<directory>$

/src/main/scripts</directory>
<includes>
<include>*/.groovy</include>
</includes>
</fileset>
</sources>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.codehaus.gmaven.runtime</groupId>
<artifactId>gmaven-runtime-1.7</artifactId>
<version>1.2</version>
<exclusions>
<exclusion>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>1.7.1</version>
</dependency>
</dependencies>
</plugin>

*.java files generated (to be processed for mojo @annotations) contain no original javadocs or annotations.
One such file is attached while original Groovy file starts as:

/**

• Plugin that creates Hudson config files to define new build projects
  */
  @MojoGoal ( "generate" )
  @MojoPhase ( "compile" )
  public class HudsonMojo extends GroovyMojo
  {
  ....
  }

or

/**

• Plugin that creates Hudson config files to define new build projects
  *
• @goal generate
• @phase compile
  */
  public class HudsonMojo extends GroovyMojo
  {
  ....
  }

In both cases the resulting file is the same (attached) and it's clean from any original javadocs or annotations.