Antlr3 Grammar Generator

The profile is activated automatically when you have a src/main/antlr3 directory. org.antlr:antlr-runtime dependency gets added to classpath and antlr3-maven-plugin is executed in generate-sources phase.

Don't forget to add the dependency explicitly to your list of dependencies into runtime scope (you don't need to specify version since it is already defined in parent pom.xml):

<dependencies>
  <dependency>
    <groupId>org.antlr</groupId>
    <artifactId>antlr-runtime</artifactId>
    <scope>runtime</scope>
  </dependency>
</dependencies>