In the method ensureProjectCoords, appArtifact.getGroupId() and appArtifact.getVersion() are compared against themselves in an if statement, when they should be compared to project.getGroup() and project.getVersion() respectively.

if (project.getName().equals(appArtifact.getArtifactId())
        && appArtifact.getGroupId().equals(appArtifact.getGroupId())
        && appArtifact.getVersion().equals(appArtifact.getVersion())) {
    return;
}