Ban logging dependencies that collide with slf4j or your chosen logging implementation.

gistfile1.xml

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-enforcer-plugin</artifactId>
  <version>1.0-alpha-3</version>
  <executions>
    <execution>
      <id>ban-other-loggers</id>
      <goals>
        <goal>enforce</goal>
      </goals>
      <configuration>
        <rules>
          <bannedDependencies>
            <searchTransitive>true</searchTransitive>
            <excludes>
              <!-- Ban the secondary frameworks -->
              <exclude>log4j:log4j</exclude>
              <exclude>commons-logging</exclude>
              <!-- Ban other slf4j bridges so 
                   we don't end up in an infinite loop -->
              <exclude>org.slf4j:slf4j-log4j12</exclude>
            </excludes>
            <message>Secondary logging frameworks are 
                 banned in preference to org.slf4j:*-over-slf4j</message>
          </bannedDependencies>
        </rules>
      </configuration>
    </execution>
  </executions>
</plugin>