Did you tried this:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
        <includes>
            <include>**/main/package/*.java</include>
        </includes>
        <excludes>
            <exclude>**/my/package/*.java</exclude>
        </excludes>
    </configuration>
</plugin>