Hello World

Just add the snippet into pom.xml

<build>
    <plugins>
        <plugin>
            <groupId>com.igormaznitsa</groupId>
            <artifactId>jcp</artifactId>
            <version>7.2.1</version>
            <executions>
                <execution>
                    <id>preprocessSources</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>preprocess</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>    

Then build project with mvn clean install and check the folder target/generated-sources/preprocessed