public void doGenerate(IProgressMonitor monitor) throws IOException {
		if (!targetFolder.getLocation().toFile().exists()) {
			targetFolder.getLocation().toFile().mkdirs();
		}
		monitor.subTask("Loading...");

///////////
		PrestoFactory factory = PrestoFactory.eINSTANCE; 
		Sistema sistema = factory.createSistema();
		sistema.setName("xxx");
		sistema.setPacote("com.xxx.yyy");
		TipoPlataforma tipo = TipoPlataforma.XXX;
		sistema.setTipo(tipo);
///////////
		
		xxx.main.Generate gen0 = new xxx.main.Generate(sistema, targetFolder.getLocation().toFile(), arguments);
		//xxx.main.Generate gen0 = new xxx.main.Generate(modelURI, targetFolder.getLocation().toFile(), arguments);
		monitor.worked(1);
		String generationID = org.eclipse.acceleo.engine.utils.AcceleoLaunchingUtil.computeUIProjectID("xxx", "xxx.main.Generate", modelURI.toString(), targetFolder.getFullPath().toString(), new ArrayList<String>());
		gen0.setGenerationID(generationID);
		gen0.doGenerate(BasicMonitor.toMonitor(monitor));
			
		
	}

    public void registerPackages(ResourceSet resourceSet) {
        super.registerPackages(resourceSet);
        
        /*
         * TODO If you need additional package registrations, you can register them here. The following line
         * (in comment) is an example of the package registration for UML. If you want to change the content
         * of this method, do NOT forget to change the "@generated" tag in the Javadoc of this method to
         * "@generated NOT". Without this new tag, any compilation of the Acceleo module with the main template
         * that has caused the creation of this class will revert your modifications. You can use the method
         * "isInWorkspace(Class c)" to check if the package that you are about to register is in the workspace.
         * To register a package properly, please follow the following conventions:
         * 
         * if (!isInWorkspace(UMLPackage.class)) {
         *     // The normal package registration if your metamodel is in a plugin.
         *     resourceSet.getPackageRegistry().put(UMLPackage.eNS_URI, UMLPackage.eINSTANCE);
         * } else {
         *     // The package registration that will be used if the metamodel is not deployed in a plugin.
         *     // This should be used if your metamodel is in your workspace and if you are using binary resource serialization.
         *     resourceSet.getPackageRegistry().put("/myproject/myfolder/mysubfolder/MyUMLMetamodel.ecore", UMLPackage.eINSTANCE);
         * }
         */
}

resourceSet.getPackageRegistry().put(XXXPackage.eNS_URI, XXXPackage.eINSTANCE);