Using the antrun-maven-plugin makes it easy, but in case you are looking for a more mavenish way which is supported within eclipse m2e, then you can use the copy-rename-maven-plugin
<plugin>
<groupId>com.coderplus.maven.plugins</groupId>
<artifactId>copy-rename-maven-plugin</artifactId>
<version>1.0.1</version>
<executions>
<execution>
<id>rename-file</id>
<phase>compile</phase>
<goals>
<goal>rename</goal>
</goals>
<configuration>
<sourceFile>${project.build.outputDirectory}/default.DS_Store</sourceFile>
<destinationFile>${project.build.outputDirectory}/.DS_Store</destinationFile>
</configuration>
</execution>
</executions>
</plugin>
And in case you have any feedback/issues with the plugin, you can reach out at https://github.com/coderplus/copy-rename-maven-plugin/