pmd-custom_ruleset.xml

<?xml version="1.0"?>
<ruleset name="TheAlgorithms/Java ruleset"
    xmlns="http://pmd.sf.net/ruleset/1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
  <description>
  Custom PMD checks for TheAlgorithms/Java
  </description>
<rule name="UselessMainMethod"
      language="java"
      message="The main method is redundant in this context"
      class="net.sourceforge.pmd.lang.rule.xpath.XPathRule">
    <description>
        Avoid using the main method.
    </description>
    <priority>3</priority>
    <properties>
        <property name="xpath">
            <value>
<![CDATA[
//MethodDeclaration[@Name = "main"]
]]>
            </value>
        </property>
    </properties>
</rule>
</ruleset>