fixed site publication failure
diff --git a/pom.xml b/pom.xml
index 5f9d845..1485753 100644
--- a/pom.xml
+++ b/pom.xml
@@ -318,6 +318,19 @@
</plugin>
</plugins>
</pluginManagement>
+ <plugins>
+ <plugin><!-- TODO remove when upgrading to parent pom 31 -->
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-enforcer-plugin</artifactId>
+ <dependencies>
+ <dependency>
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>extra-enforcer-rules</artifactId>
+ <version>1.0-beta-6</version>
+ </dependency>
+ </dependencies>
+ </plugin>
+ </plugins>
</build>
<profiles>