checkstyle.xml

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

<module name="Checker">
	<module name="TreeWalker">
		<module name="SuppressionCommentFilter" />
		<module name="ConstantName" />
		<module name="EmptyBlock" />
		<module name="PackageName" />
		<module name="MethodName" />
		<module name="TypeName">
			<property name="format" value="^[A-Z][a-zA-Z0-9]*$" />
			<message key="name.invalidPattern"
				value="Class or interface name does not match naming convention" />
		</module>
		<module name="LocalVariableName"  />
		<module name="MemberName" />
		<module name="MethodLength">
			<property name="max" value="20" />
			<message key="methodcount.error" value="Methods are too big" />
		</module>
		<module name="EmptyLineSeparator">
			<property name="allowNoEmptyLineBetweenFields" value="true" />
		</module>
		<module name="NoWhitespaceAfter">
			<property name="tokens" value="DOT" />
			<property name="allowLineBreaks" value="false" />
		</module>
		<module name="NoWhitespaceBefore" />
		<module name="SingleSpaceSeparator" />
		<module name="WhitespaceAfter" />
		<module name="LeftCurly" />
		<module name="RightCurly" />
		<module name="StaticVariableName" />
		<module name="ParameterName" />
		<module name="UnusedImports" />
	</module>
	<module name="LineLength">
		<property name="max" value="190" />
	</module>

</module>