compiler, sources は includes だが javadoc プラグインは sourceFileIncludes だったりする。
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<includes>
<include>com/example/api/common/**</include>
<include>com/example/api/client/**</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<configuration>
<includes>
<include>com/example/api/common/**</include>
<include>com/example/api/client/**</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<configuration>
<sourceFileIncludes>
<include>com/example/api/common/**</include>
<include>com/example/api/client/**</include>
</sourceFileIncludes>
</configuration>
</plugin>
</plugins>