checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<!--
	Customized checkstyle configuration that checks the coding conventions.
-->

<module name="Checker">

	<!-- Checks that each Java package has a Javadoc file used for commenting. -->
	<module name="JavadocPackage">
	<!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
		<property name="allowLegacy" value="true"/>
	</module>

	<!-- Checks whether files end with a new line. -->
	<!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
	<module name="NewlineAtEndOfFile"/>

	<!-- Checks that property files contain the same keys. -->
	<!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
	<module name="Translation"/>

	<module name="FileLength"/>

	<!-- Following interprets the header file as regular expressions. -->
	<!-- <module name="RegexpHeader"/>                                -->

	<module name="RegexpSingleline">
		<!-- \s matches whitespace character, \t matches tabulations and $ matches end of line. -->
		<property name="format" value="[^\*][\s\t]+$"/>
		<property name="message" value="No comment line has trailing spaces and/or tabs."/>
	</module>

	<module name="TreeWalker">

		<property name="cacheFile" value="${checkstyle.cache.file}"/>

		<!-- required for SuppressWarningsFilter (and other Suppress* rules not used here) -->
		<!-- see http://checkstyle.sourceforge.net/config_annotation.html#SuppressWarningsHolder -->
		<module name="SuppressWarningsHolder"/>

		<!-- Checks for Javadoc comments. -->
		<!-- See http://checkstyle.sourceforge.net/config_javadoc.html -->
		<module name="JavadocMethod"/>
		<module name="JavadocType"/>
		<module name="JavadocVariable">
			<!--<property name="ignoreNamePattern" value="serialVersionUID|LOG"/>-->
		</module>
		<module name="JavadocStyle"/>

		<!-- Checks for Naming Conventions. -->
		<!-- See http://checkstyle.sourceforge.net/config_naming.html -->
		<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"/>

		<!-- Checks for imports -->
		<!-- See http://checkstyle.sourceforge.net/config_import.html -->
		<module name="AvoidStarImport"/>
		<module name="IllegalImport"/> <!-- defaults to sun.* packages -->
		<module name="RedundantImport"/>
		<module name="UnusedImports"/>

		<!-- Checks for Size Violations.                    -->
		<!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
		<module name="LineLength">
			<property name="max" value="400"/>
		</module>
		<module name="MethodLength"/>
		<module name="ParameterNumber"/>

		<!-- Checks for whitespace                               -->
		<!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
		<module name="EmptyForIteratorPad"/>
		<module name="MethodParamPad"/>
		<module name="NoWhitespaceAfter">
			<property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS"/>
		</module>
		<module name="NoWhitespaceBefore"/>
		<module name="OperatorWrap"/>
		<module name="ParenPad"/>
		<module name="TypecastParenPad"/>
		<module name="WhitespaceAfter"/>
		<module name="WhitespaceAround"/>

		<!-- Modifier Checks                                    -->
		<!-- See http://checkstyle.sourceforge.net/config_modifiers.html -->
		<module name="ModifierOrder"/>
		<module name="RedundantModifier"/>

		<!-- Checks for blocks. You know, those {}'s         -->
		<!-- See http://checkstyle.sourceforge.net/config_blocks.html -->
		<module name="AvoidNestedBlocks"/>
		<module name="EmptyBlock"/>
		<module name="LeftCurly"/>
		<module name="NeedBraces"/>
		<module name="RightCurly">
			<property name="option" value="alone"/>
		</module>

		<!-- Checks for common coding problems               -->
		<!-- See http://checkstyle.sourceforge.net/config_coding.html -->
		<module name="AvoidInlineConditionals"/>
		<module name="EmptyStatement"/>
		<module name="EqualsHashCode"/>
		<module name="HiddenField"/>
		<module name="IllegalInstantiation"/>
		<module name="InnerAssignment"/>
		<module name="MagicNumber"/>
		<module name="MissingSwitchDefault"/>
		<module name="SimplifyBooleanExpression"/>
		<module name="SimplifyBooleanReturn"/>

		<!-- Checks for class design                         -->
		<!-- See http://checkstyle.sourceforge.net/config_design.html -->
		<module name="DesignForExtension"/>
		<module name="FinalClass"/>
		<module name="HideUtilityClassConstructor"/>
		<module name="InterfaceIsType"/>
		<module name="VisibilityModifier"/>

		<!-- Miscellaneous other checks.                   -->
		<!-- See http://checkstyle.sourceforge.net/config_misc.html -->
		<module name="ArrayTypeStyle"/>
		<module name="FinalParameters"/>
		<module name="TodoComment"/>
		<module name="UpperEll"/>

	</module>

	<!-- Support @SuppressWarnings (added in Checkstyle 5.7) -->
	<!-- see http://checkstyle.sourceforge.net/config.html#SuppressWarningsFilter -->
	<module name="SuppressWarningsFilter"/>

	<!-- Checks properties file for a duplicated properties. -->
	<!-- See http://checkstyle.sourceforge.net/config_misc.html#UniqueProperties -->
	<module name="UniqueProperties"/>

</module>