fixed NPE due to maven checkstyle plugin version

.checkstyle

 <?xml version="1.0" encoding="UTF-8"?>
 
-<fileset-config file-format-version="1.2.0" simple-config="true" sync-formatter="false">
+<fileset-config file-format-version="1.2.0" simple-config="false" sync-formatter="false">
   <local-check-config name="TeeTime" location="conf/quality-config/cs-conf.xml" type="project" description="">
     <additional-data name="protect-config-file" value="false"/>
   </local-check-config>
-  <fileset name="all" enabled="true" check-config-name="TeeTime" local="true">
-    <file-match-pattern match-pattern="." include-pattern="true"/>
+  <local-check-config name="maven-checkstyle-plugin default" location="file:/C:/Users/chw/Repositories/teetime/conf/quality-config/cs-conf.xml" type="remote" description="maven-checkstyle-plugin configuration default">
+    <property name="checkstyle.cache.file" value="${project_loc}/target/checkstyle-cachefile"/>
+    <property name="checkstyle.header.file" value="C:\Users\chw\Repositories\teetime\target\checkstyle-header-default.txt"/>
+  </local-check-config>
+  <fileset name="java-sources-default" enabled="true" check-config-name="maven-checkstyle-plugin default" local="true">
+    <file-match-pattern match-pattern="src/main/java/.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/test/java/.*\.java" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/main/resources/.*\.properties" include-pattern="true"/>
+    <file-match-pattern match-pattern="src/test/resources/.*\.properties" include-pattern="true"/>
   </fileset>
 </fileset-config>

.project

@@ -25,11 +25,17 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>net.sf.eclipsecs.core.CheckstyleBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
 		<nature>net.sourceforge.pmd.eclipse.plugin.pmdNature</nature>
+		<nature>net.sf.eclipsecs.core.CheckstyleNature</nature>
 	</natures>
 </projectDescription>

.settings/edu.umd.cs.findbugs.core.prefs

 #FindBugs User Preferences
-#Tue Nov 25 12:10:00 CET 2014
+#Tue Dec 16 14:03:06 CET 2014
 detector_threshold=3
 effort=max
 excludefilter0=.fbExcludeFilterFile|true

pom.xml

@@ -160,8 +160,6 @@
 				</executions>
 			</plugin>
 
-
-
 			<plugin>
 				<groupId>org.sonatype.plugins</groupId>
 				<artifactId>nexus-staging-maven-plugin</artifactId>
@@ -174,27 +172,11 @@
 				</configuration>
 			</plugin>
 
-			<!-- <plugin> -->
-			<!-- <groupId>org.apache.maven.plugins</groupId> -->
-			<!-- <artifactId>maven-shade-plugin</artifactId> -->
-			<!-- <executions> -->
-			<!-- <execution> -->
-			<!-- <phase>package</phase> -->
-			<!-- <goals> -->
-			<!-- <goal>shade</goal> -->
-			<!-- </goals> -->
-			<!-- </execution> -->
-			<!-- </executions> -->
-			<!-- <configuration> -->
-			<!-- <finalName>${project.artifactId}-${project.version}-with-dependencies</finalName> -->
-			<!-- </configuration> -->
-			<!-- </plugin> -->
-
 			<!-- Checkstyle -->
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
-				<version>2.13</version>
+				<version>2.12</version>
 				<executions>
 					<execution>
 						<phase>test</phase>