hbm2ddl not working for audit tables in hibernate-tool 4 - hibernate-envers

Question

I am using hibernate 4.2.0.Final and hibernate tool 4.0.0-CR1 in my application.
I am trying to execute ant task hibernatetool to generate ddl statements from the entity annotations, Its working fine for normal tables but for audit tables its not generating ddl statements though I am using "org.hibernate.tool.ant.EnversHibernateToolTask".
Below is my maven script code snippet:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<scope>compile</scope>
<version>4.0.0-CR1</version>
<exclusions>
<exclusion>
<groupId>org.eclipse</groupId>
<artifactId>text</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.core</groupId>
<artifactId>runtime</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.2.0.Final</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.2.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-envers</artifactId>
<version>4.2.0.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<configuration>
<target name="clean">
<echo
message="Target callled for cleaning the file through maven antrun-plugin" />
<delete file="${project.basedir}/schema/baseline/new_schema.sql" />
</target>
<target name="execute">
<echo message="Ant target, through maven-antrun-plugin, started" />
<property name="maven_compile_classpath" refid="maven.compile.classpath" />
<path id="hibernatetool.path">
<pathelement path="${maven_compile_classpath}" />
</path>
<taskdef name="hibernatetool"
classname="org.hibernate.tool.ant.EnversHibernateToolTask"
classpathref="hibernatetool.path" />
<hibernatetool destdir="${project.basedir}/schema/baseline/">
<jpaconfiguration persistenceunit="testunit" />
<hbm2ddl export="false" drop="false" create="true" outputfilename="new_schema.sql"
format="true" />
</hibernatetool>
<echo message="Ant target, through maven-antrun-plugin, terminated" />
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
I am finding help for hibernate-tools 3 but for hibernate-tools 4 I am not finding sufficient help.