metaModel.txt

to create the meta model it is needed to add the plugin:
            <plugin>
                <groupId>org.bsc.maven</groupId>
                <artifactId>maven-processor-plugin</artifactId>
                <version>1.3.5</version>
                <executions>
                    <execution>
                        <id>process</id>
                        <goals>
                            <goal>process</goal>
                        </goals>
                        <phase>generate-sources</phase>
                        <configuration>
                            <compilerArguments>-Aeclipselink.persistencexml=src/test/resources/META-INF/persistence.xml</compilerArguments>
                            <processors>
                                <processor>org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor</processor>
                            </processors>
                        </configuration>
                    </execution>
                </executions>
            </plugin>


        <!-- MetaModel Generator -->
        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
            <version>2.5.2</version>
            <scope>compile</scope>
        </dependency>