<dependency>
    <maven>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>antlr-maven-plugin</artifactId>
        <version>2.1</version>
    </maven>
    <jpp>
        <groupId>JPP</groupId>
        <artifactId>antlr-maven-plugin</artifactId>
        <version>2.1</version>
    </jpp>
</dependency>