MainModule
  -- Module1
  -- Module2

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<parent>
		<artifactId>MainModule</artifactId>
		<groupId>com.plugintest</groupId>
		<version>1.0-SNAPSHOT</version>
	</parent>
	<modelVersion>4.0.0</modelVersion>
	<artifactId>Module1</artifactId>
</project>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<parent>
		<artifactId>MainModule</artifactId>
		<groupId>com.plugintest</groupId>
		<version>1.0-SNAPSHOT</version>
	</parent>
	<modelVersion>4.0.0</modelVersion>
	<artifactId>Module2</artifactId>
</project>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.plugintest</groupId>
    <artifactId>MainModule</artifactId>
	<packaging>pom</packaging>
	<version>1.0-SNAPSHOT</version>
	<modules>
		<module>Module1</module>
		<module>Module2</module>
	</modules>
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-shade-plugin</artifactId>
				<version>2.2</version>
				<executions>
					<execution>
						<phase>package</phase>
						<goals>
							<goal>shade</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>
</project>