Fix mvn javadoc:jar failure due to HadoopFsWrapper. (#3729)

diff --git a/pom.xml b/pom.xml
index 40f9838..931a42d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -786,6 +786,9 @@
                     <configuration>
                         <!-- jdk8 started linting javadocs by default; ours are not fully compliant -->
                         <additionalparam>-Xdoclint:none</additionalparam>
+
+                        <!-- HadoopFsWrapper javadocs cannot be generated due to missing annotations -->
+                        <excludePackageNames>org.apache.hadoop.fs</excludePackageNames>
                     </configuration>
                 </plugin>
                 <plugin>