checkstyle.xml

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

<!--
  Lean ruleset: correctness/maintainability checks only, not code style.
-->
<module name="Checker">
    <module name="TreeWalker">
        <module name="EqualsHashCode"/>
        <module name="EqualsAvoidNull"/>
        <module name="EmptyCatchBlock"/>
        <module name="EmptyStatement"/>
        <module name="EmptyBlock">
            <property name="option" value="text"/>
            <property name="tokens" value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE"/>
        </module>
        <module name="UnusedImports"/>
        <module name="RedundantImport"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="ModifiedControlVariable"/>
        <module name="MissingSwitchDefault"/>
        <module name="FallThrough"/>
        <module name="OneStatementPerLine"/>
        <module name="CovariantEquals"/>
        <module name="NoFinalizer"/>
    </module>
</module>