Modifying jar filename using maven - maven

Question

I have a requirement that all the artifacts created by maven bear a build number.
The build number is stored in a properties file. I'm successful with controlling the names of generated EAR and WAR artifacts but not the JAR. Here are the relevant excerpts from pom.xml.
I expected the maven-jar-plugin configuration to work but it does not, I end up with jar always named SelfService-2.jar, whereas when buildNumber.properties contains buildNumber=40, maven generates SelfService-2.40.war and SelfService-2.40.ear.
How do I get the build number into the jar name?
Thanks in advance.
<artifactId>SelfService</artifactId>
<name>SelfService</name>
<packaging>war</packaging>
<version>2</version>
<build>
<finalName>${project.artifactId}-${buildNumber}</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<finalName>${project.artifactId}-${buildNumber}</finalName>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<finalName>${project.artifactId}-${buildNumber}</finalName>
</configuration>
</plugin>
....

Answer 1

I got what I was after by using the following configuration of maven-jar-plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.2</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
<configuration>
<finalName>${project.artifactId}-${buildNumber}</finalName>
</configuration>
</execution>
</executions>
<configuration>
<finalName>${project.artifactId}-${buildNumber}</finalName>
</configuration>
</plugin>