Animal sniffler for Java 5

gistfile1.xml

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-enforcer-plugin</artifactId>
  <dependencies>
    <dependency>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>animal-sniffer-enforcer-rule</artifactId>
      <version>1.6</version>
    </dependency>
  </dependencies>
  <executions>
    <execution>
      <id>check-java15</id>
      <phase>test</phase>
      <goals>
        <goal>enforce</goal>
      </goals>
      <configuration>
        <rules>
          <checkSignatureRule implementation="org.codehaus.mojo.animal_sniffer.enforcer.CheckSignatureRule">
            <ignoreDependencies>true</ignoreDependencies>
            <signature>
              <groupId>org.codehaus.mojo.signature</groupId>
              <artifactId>java15</artifactId>
              <version>1.0</version>
            </signature>
          </checkSignatureRule>
        </rules>
      </configuration>
    </execution>
  </executions>
</plugin>