The PDF plugin could be coupled with the Maven Site plugin to generate both site documentation and pdfs. To do it, you need to define a custom <execution/> tag:
<project> ... <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-pdf-plugin</artifactId> <executions> <execution> <id>pdf</id> <phase>site</phase> <goals> <goal>pdf</goal> </goals> <configuration> <outputDirectory>${project.reporting.outputDirectory}</outputDirectory> </configuration> </execution> </executions> </plugin> ... </plugins> </build> ... </project>