How to Include a SINGLE dependency into a jar using maven and fatjar plugin

I feel a bit stupid about this question but i can't figure out how to add a SINGLE dependency (jdom.jar) into another jar.

Context: We developed a simple plug-in for our application, this plug-in have many dependency. We were using fatjar to include jdom.jar into it. I am trying to fix a bug in this plug-in, so i decided to "maven-ize" it at the same time. (We just switched to maven) This plug-in is loaded on the runtime so the only dependencies we want packaged with it is the jdom.jar.

Problem: I found that there is a maven fatjar plug-in! Unfortunately i could not find any documentation and this maven plug-in add EVERY dependency into the ouput jar. After many try i decided to give up on this fatjar plug-in and searched for another one. I found one-jar , shade but after a quick read on them they look like they add every dependency.

Question: what would be a simple way to add only jdom.jar into my plug-in jar like this:

-MyPlug-in.jar
|
|-src
 |-main
  |-java
   |-*.java
|-jdom.jar

Also I don't want to alter the manifest or the output jar filename

Thank a lots for your time.

Solution

There was no answer here regarding how to use maven to include one single jar-file with the maven-shader-plugin. It took me some time to figure out how to actually do that. Here is a snippet to include just the classes from the dependency com.googlecode.json-simple:json-simple.

<project>
    ...
    <build>
        <plugins>
            ...
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>1.6</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <artifactSet>
                                <includes>
                                   <include>com.googlecode.json-simple:json-simple</include>
                                </includes>
                            </artifactSet>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            ...
        </plugins>
    </build>
    ...
</project>