hibernate3-maven-plugin and hbm2ddl

I've wrestled with this quite a bit in the past few days. I had a difficult time figuring out some of the settings from the plugin site. Here's what I finally ended up with that works properly.

<plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>hibernate3-maven-plugin</artifactId>
      <version>2.1</version>
      <configuration>
       <components>
        <component>
         <name>hbm2ddl</name>
         <implementation>
          jpaconfiguration
         </implementation>
        </component>
       </components>
                <componentProperties>
                    <drop>true</drop>
                    <jdk5>true</jdk5>
                    <outputfilename>schema.ddl</outputfilename>
                    <persistenceunit>Developer</persistenceunit>
                    <propertyfile>target/classes/jdbc.properties</propertyfile>
                    <skip>${maven.test.skip}</skip>
                </componentProperties>
      </configuration>
      <dependencies>
   <dependency>
       <groupId>hsqldb</groupId>
       <artifactId>hsqldb</artifactId>
       <version>1.8.0.7</version>
   </dependency> 
   </dependencies>      
</plugin>