Add license to Java source Maven project

from this project.

	<build>
		<plugins>
			<plugin>
				<groupId>com.mycila</groupId>
				<artifactId>license-maven-plugin</artifactId>
				<version>2.6</version>
				<configuration>
					<header>com/mycila/maven/plugin/license/templates/APACHE-2.txt</header>
					<properties>
						<owner>Jose Manuel Prieto Palacios</owner>
						<email>josemanuel@prietopalacios.net</email>
					</properties>
					<excludes>
						<exclude>**/README</exclude>
						<exclude>**/*.launch</exclude>
						<exclude>**/*.xml</exclude>
						<exclude>**/*.properties</exclude>
						<exclude>**/*.txt</exclude>
						<exclude>src/test/resources/**</exclude>
						<exclude>src/main/resources/**</exclude>
					</excludes>
				</configuration>
				<executions>
					<execution>
						<goals>
							<goal>check</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

Licenses:

• AGPL-3
• APACHE-2
• BSD-2
• BSD-3
• BSD-4
• GPL-3
• LGPL-3
• MIT
• MPL-2
• WTFPL