checkstyle_config.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
		"-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
		"https://checkstyle.org/dtds/configuration_1_3.dtd">

<module name="Checker">
	<property name="severity" value="warning"/>

	<property name="fileExtensions" value="java, properties, xml"/>

	<module name="BeforeExecutionExclusionFileFilter">
		<property name="fileNamePattern" value="module\-info\.java$"/>
	</module>

	<module name="SuppressionFilter">
		<property name="file" value="${org.checkstyle.sun.suppressionfilter.config}"
				default="checkstyle-suppressions.xml" />
		<property name="optional" value="true"/>
	</module>

	<module name="JavadocPackage"/>

	<module name="NewlineAtEndOfFile"/>

	<module name="Translation"/>

	<module name="FileLength"/>
	<module name="LineLength">
		<property name="fileExtensions" value="java"/>
		<property name="max" value="300"/>
	</module>

	<module name="FileTabCharacter"/>

	<module name="RegexpSingleline">
		<property name="format" value="\s+$"/>
		<property name="minimum" value="0"/>
		<property name="maximum" value="0"/>
		<property name="message" value="Line has trailing spaces."/>
	</module>

	<module name="TreeWalker">
		<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="IllegalImport"/>
		<module name="RedundantImport"/>
		<module name="UnusedImports">
			<property name="processJavadoc" value="false"/>
		</module>

		<module name="MethodLength"/>
		<module name="ParameterNumber"/>

		<module name="EmptyForIteratorPad"/>
		<module name="GenericWhitespace"/>
		<module name="MethodParamPad"/>
		<module name="NoWhitespaceAfter"/>
		<module name="NoWhitespaceBefore"/>
		<module name="OperatorWrap"/>
		<module name="ParenPad"/>
		<module name="TypecastParenPad"/>
		<module name="WhitespaceAfter"/>
		<module name="WhitespaceAround"/>

		<module name="ModifierOrder"/>
		<module name="RedundantModifier"/>

		<module name="AvoidNestedBlocks"/>
		<module name="EmptyBlock"/>
		<module name="LeftCurly"/>
		<module name="NeedBraces"/>
		<module name="RightCurly"/>

		<module name="EmptyStatement"/>
		<module name="EqualsHashCode"/>
		<module name="HiddenField" >
			<property name="ignoreSetter" value="true"/>
			<property name="ignoreConstructorParameter" value="true"/>
		</module>
		<module name="IllegalInstantiation"/>
		<module name="InnerAssignment"/>
		<module name="MagicNumber"/>
		<module name="MissingSwitchDefault"/>
		<module name="MultipleVariableDeclarations"/>
		<module name="SimplifyBooleanExpression"/>
		<module name="SimplifyBooleanReturn"/>

		<module name="DesignForExtension"/>
		<module name="FinalClass"/>
		<module name="HideUtilityClassConstructor"/>
		<module name="InterfaceIsType"/>
		<module name="VisibilityModifier"/>

		<module name="ArrayTypeStyle"/>
		<module name="TodoComment"/>
		<module name="UpperEll"/>

		<module name="SuppressionXpathFilter">
			<property name="file" value="${org.checkstyle.sun.suppressionxpathfilter.config}"
						default="checkstyle-xpath-suppressions.xml" />
			<property name="optional" value="true"/>
		</module>
	</module>
</module>