maven-archetype-archetype/src/main/resources/META-INF/maven/archetype.xml

<archetype>
  <id>archetype</id>
  <resources>
    <resource>src/main/resources/archetype-resources/pom.xml</resource>
    <resource>src/main/resources/archetype-resources/src/main/java/App.java</resource>
    <resource>src/main/resources/archetype-resources/src/test/java/AppTest.java</resource>
    <resource>src/main/resources/META-INF/maven/archetype.xml</resource>
  </resources> 
</archetype>