public void execute() throws MojoExecutionException, MojoFailureException {
parseVersion(_oldVersion, true);
parseVersion(_newVersion, false);
AtomicBoolean projectModified = new AtomicBoolean(false);
try {
Configuration project = new ConfigurationPuller(false).pull(_project_file);
if (project != null) {
setVersion(project.getFirstChild("version"), _newVersion_pom, projectModified);
Configuration project_parent = project.getFirstChild("parent");
if (project_parent != null) {
Configuration project_parent_groupId = project_parent.getFirstChild("groupId");