fixes

Signed-off-by: Attila Mészáros <[email protected]>

Author: csviri

pom.xml

@@ -281,7 +281,7 @@ under the License.
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.4.0</version>
+                <version>3.6.0</version>
                 <dependencies>
                     <dependency>
                         <groupId>com.puppycrawl.tools</groupId>

tools/maven/checkstyle.xml

@@ -285,6 +285,7 @@ This file is based on the checkstyle file of Apache Beam.
 		<module name="JavadocParagraph"/>
 
 		<module name="JavadocType">
+			<property name="scope" value="protected"/>
 			<property name="severity" value="error"/>
 			<property name="allowMissingParamTags" value="true"/>
 		</module>