$headContent

Alternative Filename Extensions

To use an extension other than .g for grammar files, use the includes configuration element (remember to have an entry in this list for .g files if you still want them to work as well):

      ...
      <plugin>
        <groupId>org.codehaus.mojo.antlr3</groupId>
        <artifactId>antlr3-maven-plugin</artifactId>
        ...
        <configuration>
          <includes>
            <include>**/*.g</include>
            <include>**/*.g3</include>
          </includes>
        </configuration>
      </plugin>
      ...