tools/maven/checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
          "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<module name="Checker">
	<!-- Syntax:    //CHECKSTYLE.OFF: CheckstyleModuleToDisable - Reason for deactivation. -->
	<!--            //CHECKSTYLE.ON: CheckstyleModuleToReEnable                            -->
	<module name="SuppressionCommentFilter">
    		<property name="offCommentFormat" value="CHECKSTYLE.OFF\: ([\w\|]+) - (.+)"/>
    		<property name="onCommentFormat" value="CHECKSTYLE.ON\: ([\w\|]+)"/>
    		<property name="checkFormat" value="$1"/>
	</module>

	<module name="FileLength" />
	<module name="TreeWalker">
		<module name="RegexpSinglelineJava">
			<property name="format" value="^\t* +\t*\S" />
			<property name="message"
				value="Line has leading space characters; indentation should be performed with tabs only." />
			<property name="ignoreComments" value="true" />
		</module>
		<module name="AvoidStarImport" />
		<module name="UnusedImports">
			<!-- Allow imports for JavaDocs -->
			<property name="processJavadoc" value="true"/>
		</module>
		<module name="NeedBraces">
			<property name="tokens" value="LITERAL_IF, LITERAL_ELSE"/>
		</module>
		<module name="ArrayTypeStyle" />

		<module name="FileContentsHolder"/>

	<!--	<module name="ConstantName" />
		<module name="LocalFinalVariableName" />
		<module name="LocalVariableName" />
		<module name="MemberName" />
		<module name="MethodName" />
		<module name="PackageName" />
		<module name="ParameterName" />
  	<module name="StaticVariableName" />
		<module name="TypeName" />
		<module name="AvoidStarImport" />
		<module name="RedundantImport" />
		<module name="UnusedImports" />
	  <module name="MethodLength" />
		<module name="ParameterNumber" />
		<module name="AvoidNestedBlocks" />
		<module name="EmptyBlock" />
		<module name="LeftCurly" />
		<module name="NeedBraces" />
		<module name="RightCurly" /> 
		<module name="EmptyStatement" />
		<module name="EqualsHashCode" />
		<module name="IllegalInstantiation" />
		<module name="MissingSwitchDefault" />
		<module name="RedundantThrows" />
		<module name="SimplifyBooleanExpression" />
		<module name="SimplifyBooleanReturn" />
		<module name="HideUtilityClassConstructor" />
		<module name="InterfaceIsType" />
		<module name="VisibilityModifier" />
		<module name="ArrayTypeStyle" />
		<module name="UpperEll" /> -->
	</module>
</module>