plugin does not work on projects without main()

[jay-g-mehta]

Hi,
Nice work on your plugin!

This plugin does not work for projects which are libs or frameworks only or in short projects which do not have main().

For example I tried with my project: https://github.com/jay-g-mehta/reflectioninvoker
and have this plugin in my pom.xml as :

           <plugin>
                <groupId>com.iluwatar.urm</groupId>
                <artifactId>urm-maven-plugin</artifactId>
                <version>1.4.8</version>
                <configuration>
                    <!-- if outputDirectory is not set explicitly it will default to your build dir -->
                    <outputDirectory>${project.basedir}/etc</outputDirectory>
                    <packages>
                        <param>reflectioninvoker</param>
                    </packages>
                    <includeMainDirectory>true</includeMainDirectory>
                    <includeTestDirectory>false</includeTestDirectory>
                    <presenter>graphviz</presenter>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>map</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

It didn't work.

I created a dummy Main.java as:

package reflectioninvoker;

public class Main {
    public static void main(String args[]) {

    }
}

and this plugin worked.