Add Checkstyle JavadocPackage

Author: garydgregory

src/conf/checkstyle.xml

@@ -15,19 +15,17 @@ 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.
 -->
-
 <!DOCTYPE module PUBLIC
     "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
     "https://checkstyle.org/dtds/configuration_1_3.dtd">
-
-<!-- commons codec customization of default Checkstyle behavior -->
 <module name="Checker">
   <module name="FileTabCharacter">
     <property name="fileExtensions" value="java" />
   </module>
   <module name="Header">
     <property name="headerFile" value="${checkstyle.header.file}" />
   </module>
+  <module name="JavadocPackage" />
   <module name="LineLength">
       <!-- Ignore lines that begin with " * ", such as within a Javadoc comment. -->
       <property name="ignorePattern" value="^ *\* *[^ ]"/>