idea_plugin/resources/META-INF/plugin.xml

<idea-plugin url="https://github.com/google/google-java-format/tree/master/idea_plugin">
  <id>google-java-format</id>
  <name>google-java-format</name>
  <vendor url="https://github.com/google/google-java-format">
    Google
  </vendor>

  <!-- Mark it as available on all JetBrains IDEs. It's really only useful in
       IDEA and Android Studio, but there's no way to specify that for some
       reason. It won't crash PyCharm or anything, so whatever. -->
  <depends>com.intellij.modules.lang</depends>

  <change-notes><![CDATA[
    <dl>
      <dt>1.7.0.1</dt>
      <dd>Added support for 2019.1 IDEs.</dd>
      <dt>1.7.0.0</dt>
      <dd>Upgraded to google-java-format 1.7.</dd>
    </dl>
  ]]></change-notes>

  <project-components>
    <component>
      <implementation-class>
        com.google.googlejavaformat.intellij.GoogleJavaFormatInstaller
      </implementation-class>
      <loadForDefaultProject/>
    </component>
    <component>
      <implementation-class>
        com.google.googlejavaformat.intellij.InitialConfigurationComponent
      </implementation-class>
    </component>
  </project-components>

  <extensions defaultExtensionNs="com.intellij">
    <projectConfigurable instance="com.google.googlejavaformat.intellij.GoogleJavaFormatConfigurable"
                         id="google-java-format.settings"
                         displayName="google-java-format Settings"/>
    <projectService serviceImplementation="com.google.googlejavaformat.intellij.GoogleJavaFormatSettings"/>
  </extensions>

</idea-plugin>