Maven Webapp Project not recognizing the custom ruleset during build - eclipse

Question

I have a Maven WebApp project (Just a HelloWorld Servlet) in Eclipse and running tomcat server. My ultimate aim is to fail the build if the code contains out.print statements. I have defined the maven pmd plugin 2.5 in the pom.xml as below and defined a customized ruleset in a file called sop.xml as below.
But when I right click the project -> Run As -> Maven Build and try to package it, the build is successful and creating the war file. I want the build to fail because the .java code contains the out.print statements.
I am new to Maven and requesting all your kind help on this regard. Thanks.
Ruleset file(sop.xml):
<?xml version="1.0"?>
<ruleset name="Custom ruleset" xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0
http://pmd.sourceforge.net/ruleset_2_0_0.xsd"
xsi:noNamespaceSchemaLocation="http://pmd.sourceforge.net/ruleset_2_0_0.xsd">
<description>This ruleset checks my code for println statements</description>
<rule ref="rulesets/JavaLogging.xml" message="Must handle exceptions">
</rule>
</ruleset>
POM.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>MavenWebGroupId</groupId>
<artifactId>MavenWebArtifactId</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>MavenWebName</name>
<description>MavenWebDescription</description>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-pmd-plugin</artifactId>
<version>2.5</version>
<configuration>
<skip>false</skip>
<targetJdk>${compile.source}</targetJdk>
<rulesets>
<!-- Custom local file system rule set -->
<ruleset>c:\rulesets\sop.xml</ruleset>
</rulesets>
<linkXref>true</linkXref>
<failOnViolation>true</failOnViolation>
</configuration>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>build</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.0</version>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.6</version>
</dependency>
</dependencies>
</project>

Answer 1

Looks like maven-pmd-plugin doesn't executed during packaging. To calling this plugin during packaging define it as follows:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-pmd-plugin</artifactId>
<version>2.5</version>
<configuration>
...
</configuration>
<dependencies>
...
</dependencies>
<executions>
<execution>
<id>run-pmd</id>
<phase>prepare-package</phase>
<goals>
<goal>check</goal>
</goals>
</execution>
</executions>
</plugin>
Note to <executions> tag.