Plugin manipulating POM files

Hello everybody,
  I'm coding a NetBeans plugin that should offer a code generator (Alt + Ins) inside maven pom.xml files.
I would like my code generator to behave a lot like the existing "Generate Dependency..." code generator and I studied its sources in the maven.grammar module (org.netbeans.modules.maven.codegen.DependencyGenerator).
The aforementioned generator manipulates the pom trough a maven pom model api contained in the maven.model module that seems to be unaccessible.

I managed to create such a generator in a prototype ant based netbeans module project by specifying an implementation dependency on the "Maven Editor Model" (codenamebase org.netbeans.modules.maven.model) but I would like to do the same in a maven based netbeans module project.

So far I added the following dependencies in the netbeans module project pom:

Code:

...
        <dependency>
            <groupId>org.netbeans.api</groupId>
            <artifactId>org-netbeans-modules-maven-model</artifactId>
            <version>RELEASE691</version>
        </dependency>
        <dependency>
            <groupId>org.netbeans.api</groupId>
            <artifactId>org-netbeans-modules-maven-embedder</artifactId>
            <version>RELEASE691</version>
        </dependency>
...




The latter was required according to the nbm plugin.
I also specified an implementation dependency by configuring the nbm plugin as follows:

Code:

                <configuration>
                    <moduleDependencies>
                        <dependency>
                            <id>org.netbeans.modules:org-netbeans-modules-maven-model</id>
                            <type>impl</type>
                        </dependency>
                        <dependency>
                            <id>org.netbeans.modules:org-netbeans-modules-maven-embedder</id>
                            <type>impl</type>
                            <explicitValue>org.netbeans.modules.maven.embedder/2 = 2.51.1</explicitValue>
                        </dependency>
                    </moduleDependencies>
                </configuration>




The project compiles fine however when I run the plugin I get the following warning:
Warning - could not install some modules: NB SpringBoot - The module named org.netbeans.modules.maven.embedder/1 was needed and not found.

How should I configure the maven project to successfully work like the ant based prototype?

Thanks in advance.