maven-jar-plugin

indicate the main class using maven-jar-plugin

<plugin>
  	<artifactId>maven-jar-plugin</artifactId>
  	<version>2.3</version>
  	<configuration>
  		<archive>
  			<manifest>
  				<mainClass>com.redhat.sample.App</mainClass>
			</manifest>
		</archive>
	</configuration>
</plugin>