The generation failed to generate any file because there are no model elements that matches at least the type of the first parameter of one of your main templates. 
The problem may be caused by a problem with the registration of your metamodel, please see the method named "registerPackages" in the Java launcher of your generator. It could also come from a missing [comment @main/] 
in the template used as the entry point of the generation. 

<plugin>
				<groupId>org.eclipse.acceleo</groupId>
				<artifactId>org.eclipse.acceleo.maven</artifactId>
				<version>3.5.0-SNAPSHOT</version>
				<executions>
					<execution>
						<phase>compile</phase>
						<goals>
							<goal>acceleo-compile</goal> XXXHEREXXXX
						</goals>
					</execution>
				</executions>
				<configuration> <useBinaryResources>false</useBinaryResources> <usePlatformResourcePath>true</usePlatformResourcePath> 
					<acceleoProject> <root>${project.basedir}</root> <entries> <entry> <input>src/main/java</input> 
					<output>target/classes</output> </entry> </entries> </acceleoProject> <packagesToRegister> 
					<packageToRegister>org.eclipse.uml2.uml.UMLPackage</packageToRegister> </packagesToRegister> 
					</configuration>
			</plugin>

<plugin>
				<groupId>org.eclipse.acceleo</groupId>
				<artifactId>org.eclipse.acceleo.maven.launcher</artifactId>
				<version>3.5.0-SNAPSHOT</version>
				<executions>
					<execution>
						<phase>process-resources</phase>
						<goals>
							<goal>acceleo-launcher</goal>
						</goals>
					</execution>
				</executions>
				<configuration>
					<!-- generatorClass>org.eclipse.acceleo.module.sample.main.Generate</generatorClass -->
					<generatorClass>org.eclipse.acceleo.module.example.uml2java.helios.GenerateJava</generatorClass>
					
					<model>${basedir}\src\main\model\example.uml</model>
					<outputFolder>${basedir}\src</outputFolder>
				</configuration>
				<dependencies>
					<dependency>
						<groupId>org.eclipse.acceleo</groupId>
						<artifactId>org.eclipse.acceleo.maven.tests</artifactId>
						<version>3.6.0-SNAPSHOT</version>
					</dependency>
				</dependencies>
			</plugin>

[INFO] Generation completed.
The generation failed to generate any file because there are no model elements that matches at least the type of the first parameter of one of your main templates. 
The problem may be caused by a problem with the registration of your metamodel, please see the method named "registerPackages" in the Java launcher of your generator. It could also come from a missing [comment @main/] 
in the template used as the entry point of the generation. 
[INFO] 

[template public generateClass(c : Class)]
[comment @main /]

@Override
	public void registerPackages(ResourceSet resourceSet) {
		System.out.println("kjkj");
        super.registerPackages(resourceSet);
        if (!isInWorkspace(org.eclipse.uml2.uml.UMLPackage.class)) {
        	System.out.println("kjkjaa");
            resourceSet.getPackageRegistry().put(org.eclipse.uml2.uml.UMLPackage.eINSTANCE.getNsURI(), org.eclipse.uml2.uml.UMLPackage.eINSTANCE);
        }
        
        /*
         * 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);
         * }
         * 
         * To learn more about Package Registration, have a look at the Acceleo Launcher documentation (Help -> Help Contents).
         */
    }

/*******************************************************************************
 * File generated from the model::org.eclipse.acceleo.java::Person uml Class
 * Generated by the Acceleo 3 <i>UML to Java</i> generator.
 * Date: 27 novembre 2014 18:22:33 CET
 *******************************************************************************/
package org.eclipse.acceleo.java;

import ;
import java.util.Date;
// Start of user code (user defined imports)

// End of user code

/**
 * Description of Person.
 * 
 * @author 
 */


}