checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
          "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
          "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">
	<property name="severity" value="error" />
	
	<module name="FileLength">
		<property name="max" value="400" />
	</module>
	
	<module name="TreeWalker">
		<module name="PackageName">
			<property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$" />
		</module>
		<module name="TypeName">    
	        <property name="format" value="(^[A-Z][a-zA-Z0-9]{0,30}$)"/>    
	    </module>  
	      
	    <module name="MethodName">            
	      <property name="format" value="(^[a-z][a-zA-Z0-9]{0,19}$)"/>           
	    </module>   
	      
	    <module name="MemberName">    
	        <property name="format" value="(^[a-z][a-z0-9][a-zA-Z0-9]{0,19}$)"/>           
	    </module>  
	      
	    <module name="ParameterName">  
	        <property name="format" value="(^[a-z][a-zA-Z0-9_]{0,19}$)"/>           
	    </module>
		
		<module name="JavadocType">    
			<property name="authorFormat" value="\S"/>    
			<property name="scope" value="public"/>          
			<property name="tokens" value="CLASS_DEF,INTERFACE_DEF"/>    
		</module>
    
	    <module name="JavadocMethod">    
	        <property name="scope" value="public"/>  
            <property name="tokens" value="METHOD_DEF"/>    
	        <property name="allowMissingParamTags" value="false"/>    
	        <property name="allowMissingThrowsTags" value="false"/>    
	        <property name="allowMissingReturnTag" value="false"/> 
	        <property name="allowUndeclaredRTE" value="true"/>    
	        <property name="allowThrowsTagsForSubclasses" value="true"/>    
	        <property name="allowMissingPropertyJavadoc" value="true"/>  
	    </module> 
	    
		<module name="UnusedImports" />
		<module name="LineLength">
			<property name="max" value="200" />
		</module>
		<module name="ParameterNumber">
			<property name="max" value="5" />
			<property name="tokens" value="METHOD_DEF" />
		</module>

		<module name="NeedBraces" />
		<module name="StringLiteralEquality" />
		<module name="NestedIfDepth">
			<property name="max" value="3" />
		</module>
		<module name="NestedTryDepth">
			<property name="max" value="2" />
		</module>
		<module name="PackageDeclaration" />
		<module name="ReturnCount">
			<property name="max" value="3" />
			<property name="format" value="^$" />
		</module>
        
        <module name="LeftCurly">
            <property name="option" value="nl"/>
            <property name="tokens" value="CLASS_DEF,INTERFACE_DEF,ANNOTATION_DEF"/> 
        </module>
		
		<module name="RightCurly">
            <property name="option" value="alone"/>
        </module>
	</module>
</module>