I created a project using the org.openarchetypes:multi-javaee6-archetype:0.0.1-SNAPSHOT from http://open-archetypes.github.com/maven-repo/snapshots/archetype-catalog.xml (Maven > Archetypes > Add Remote Catalog)

This creates a multi module project, containing a parent pom, an ear, war, ejb and utility projects. This openshift profile was added to the pom project :

<profiles>
<profile>
<!-- When built in OpenShift the openshift profile will be used when invoking mvn. -->
<!-- Use this profile for any OpenShift specific customization your app will need. -->
<!-- By default that is to put the resulting archive into the deployments folder. -->
<!-- http://maven.apache.org/guides/mini/guide-building-for-different-environments.html -->
<id>openshift</id>
<build>
   <finalName>hello</finalName>
   <plugins>
     <plugin>
       <artifactId>maven-war-plugin</artifactId>
       <version>2.1.1</version>
       <configuration>
         <outputDirectory>deployments</outputDirectory>
         <warName>ROOT</warName>
       </configuration>
     </plugin>
   </plugins>
 </build>
</profile>

Actually, it should :

• check the packaging type of all the generated projects
• if some EARs are found, then add the following to the parent pom (pay attention to the <pluginManagement> section) :

  <profile>
   <id>openshift</id>
   <build>
     <pluginManagement>
      <plugins>
         <plugin>
            <artifactId>maven-ear-plugin</artifactId>
            <version>2.7</version>
            <configuration>
               <outputDirectory>deployments</outputDirectory>
            </configuration>
         </plugin>
      </plugins>
    </pluginManagement>
   </build>
  </profile>
  

• if there are no EARs but some WARs are found (count them), then add the following to the parent pom (pay attention to the <pluginManagement> section) :

  <profiles>
  <profile>
  <id>openshift</id>
  <build>
    <pluginManagement>
     <plugins>
       <plugin>
         <artifactId>maven-war-plugin</artifactId>
         <version>2.2</version>
         <configuration>
           <outputDirectory>deployments</outputDirectory>
           <!-- Add warName ROOT ONLY if there's ONE War, otherwise, skip it -->
           <warName>ROOT</warName>
         </configuration>
       </plugin>
     </plugins>
    </pluginManagement>
   </build>
  </profile>
  

  The finalName is irrelevant to openshift, only the warName counts.