This example pom.xml demonstrates what you need in order to have maven generate a HAR file using maven-har-plugin and execute the regular JAR pacakging.
<project> ... <build> ... <plugins> ... <plugin> <groupId>net.sf.maven-har</groupId> <artifactId>maven-har-plugin</artifactId> <version>1.0</version> <extensions>true</extensions> </plugin> ... <plugin> <artifactId>maven-jar-plugin</artifactId> <executions> <execution> <goals> <goal>jar</goal> </goals> <phase>package</phase> </execution> </executions> <configuration> <classifier>jar</classifier> </configuration> </plugin> ... </plugins> ... </build> ... <packaging>har</packaging> ... </project>