checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
	<module name="NewlineAtEndOfFile"/>
	<module name="RegexpSingleline">
		<property name="format" value="^\t*(?! \*) "/>
		<property name="message" value="Non-tab indentation detected"/>
		<property name="fileExtensions" value="java"/>
	</module>
	<module name="RegexpSingleline">
		<property name="format" value="^\t* "/>
		<property name="message" value="Non-tab indentation detected"/>
		<property name="fileExtensions" value="proto xml"/>
	</module>
	<module name="RegexpSingleline">
		<property name="format" value="\s+$"/>
		<property name="message" value="Tailing whitespace detected"/>
	</module>
	<module name="TreeWalker">
		<module name="ArrayTypeStyle"/>
		<module name="AvoidStarImport">
			<property name="allowStaticMemberImports" value="true"/>
		</module>
		<module name="EmptyStatement"/>
		<module name="GenericWhitespace"/>
		<module name="IllegalImport"/>
		<module name="IllegalInstantiation"/>
		<module name="IllegalThrows"/>
		<module name="ImportOrder">
			<property name="groups" value="java,javax,jakarta,io,org,com"/>
			<property name="option" value="top"/>
			<property name="separated" value="true"/>
			<property name="separatedStaticGroups" value="true"/>
			<property name="sortStaticImportsAlphabetically" value="true"/>
		</module>
		<module name="LeftCurly"/>
		<module name="ModifierOrder"/>
		<module name="RedundantImport"/>
		<module name="RedundantModifier"/>
		<module name="RightCurly"/>
		<module name="UnusedImports"/>
		<module name="UpperEll"/>
	</module>
</module>