Javadoc fixes

- fix missing Javadoc @param and @throw annotations
- enable checkstyle checks for method javadocs on non-private methods

Change-Id: I9a370419a699bab3225d85f2f641927600b9f11c
diff --git a/tools/build/conf/src/main/resources/onos/checkstyle.xml b/tools/build/conf/src/main/resources/onos/checkstyle.xml
index 78110c83d..5d81aa5 100644
--- a/tools/build/conf/src/main/resources/onos/checkstyle.xml
+++ b/tools/build/conf/src/main/resources/onos/checkstyle.xml
@@ -132,8 +132,10 @@
         <!-- Checks for Javadoc comments.                     -->
         <!-- See http://checkstyle.sf.net/config_javadoc.html -->
         <module name="JavadocMethod">
-            <property name="severity" value="warning"/>
+            <property name="scope" value="package"/>
+	    <property name="allowMissingJavadoc" value="true"/>
             <property name="allowUndeclaredRTE" value="true"/>
+	    <property name="suppressLoadErrors" value="true"/>
         </module>
         <module name="JavadocType">
             <property name="severity" value="warning"/>