How to keep war clean

pom.xml

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-enforcer-plugin</artifactId>
    <version>1.4</version>
    <executions>
        <execution>
            <id>enforce-banned-dependencies</id>
            <goals>
                <goal>enforce</goal>
            </goals>
            <configuration>
                <rules>
                    <bannedDependencies>
                        <excludes>
                            <exclude>org.hibernate</exclude>
                            <exclude>org.slf4j:slf4j-api:jar:*:compile</exclude>
                        </excludes>
                    </bannedDependencies>
                </rules>
            </configuration>
        </execution>
        <execution>
            <id>enforce-file-size</id>
            <goals>
                <goal>enforce</goal>
            </goals>
            <phase>package</phase>
            <configuration>
                <rules>
                    <requireFilesSize>
                        <!-- size in bytes -->
                        <maxsize>7000000</maxsize>
                        <files>
                            <file>${project.build.directory}/${project.build.finalName}.war</file>
                        </files>
                    </requireFilesSize>
                </rules>
            </configuration>
        </execution>
    </executions>
</plugin>