dev-support/checkstyle-suppressions.xml

<?xml version="1.0"?>
<!--
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License. See accompanying LICENSE file.
-->
<!DOCTYPE suppressions PUBLIC
    "-//Checkstyle//DTD SuppressionFilter Configuration 1.1//EN"
    "https://checkstyle.org/dtds/suppressions_1_1.dtd">

<suppressions>
  <!-- Generated package-info.java is unlikely to need a Javadoc line. -->
  <suppress checks="JavadocPackage" files="[\\/]src[\\/]test[\\/].*"/>
  <suppress checks="JavadocPackage" files="[\\/]src[\\/][\w\-]*generated[\\/].*"/>

  <!-- Test code: relax structural rules. Tests use lowercased static fields,
       public fixture fields, and short test-helper utility classes. -->
  <suppress checks="VisibilityModifier"          files="[\\/]src[\\/]test[\\/]"/>
  <suppress checks="ConstantName"                files="[\\/]src[\\/]test[\\/]"/>
  <suppress checks="HideUtilityClassConstructor" files="[\\/]src[\\/]test[\\/]"/>
  <suppress checks="JavadocStyle"                files="[\\/]src[\\/]test[\\/]"/>

  <!-- Per-FS DiagnosticsInfo subclasses follow a project convention: each
       declares `classnames`, `optionalClassnames`, `options`, `optionalCapabilities`
       arrays in the same shape across stores so they read like a table. The
       convention predates Hadoop's Sun-checks-derived ConstantName rule. -->
  <suppress checks="ConstantName"
            files="[\\/]src[\\/]main[\\/]java[\\/]org[\\/]apache[\\/]hadoop[\\/]fs[\\/]store[\\/]diag[\\/].*DiagnosticsInfo\.java"/>

  <!-- Default-package CLI shims (e.g. dux.java, storediag.java). Each is a
       lowercase-named one-liner that delegates to its target Tool class so
       `hadoop jar cloudstore.jar dux ...` resolves at the bare class name.
       The lowercase identifier is the public CLI surface and must stay
       byte-stable. The default package also prevents a package-info.java. -->
  <suppress checks="TypeName"        files="[\\/]src[\\/]main[\\/]java[\\/][a-z][^\\/]*\.java"/>
  <suppress checks="JavadocPackage"  files="[\\/]src[\\/]main[\\/]java[\\/][a-z][^\\/]*\.java"/>
</suppressions>