checkstyle.xml

<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
    <module name="TreeWalker">
        <!-- Code convention checking -->
        <!-- One statement per line, one declaration per line -->
        <module name="OneStatementPerLine">
            <property name="treatTryResourcesAsStatement" value="true"/>
        </module>

        <!-- Add at least one blank line between method definitions and property definitions -->
        <module name="EmptyLineSeparator">
            <property name="tokens" value="VARIABLE_DEF, METHOD_DEF"/>
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>

        <!-- Only one declaration per line -->
        <module name="MultipleVariableDeclarations"/>

        <!-- Remove unnecessary parentheses -->
        <module name="UnnecessaryParentheses"/>

        <!-- Avoid Redundant Initializations -->
        <module name="ExplicitInitialization"/>

        <!-- Other checking -->

        <!-- Loops need braces except they are a single line statement -->
        <module name="NeedBraces">
            <property name="tokens" value="LITERAL_CASE, LITERAL_DEFAULT"/>
            <property name="allowSingleLineStatement" value="true"/>
        </module>

        <!-- Class name should be a Hungarian notation, has to start with uppercase -->
        <module name="TypeName"/>

        <!-- Method name should have a Hungarian notation, has to start with lowercase -->
        <module name="MethodName">
            <property name="format" value="^[a-zA-Z](_?[a-zA-Z0-9]+)*$"/>
            <property name="allowClassName" value="true"/>
        </module>

        <!-- Naming a variable in a loop can be one char, other variables have Hungarian notation -->
        <module name="LocalVariableName">
            <property name="format" value="^[a-z][_a-zA-Z0-9]+$"/>
            <property name="allowOneCharVarInForLoop" value="true"/>
        </module>
    </module>
</module>