RAT-369: Add tweak info about subpackage syntax

apache-rat/spotbugs_ignore.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  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.
+-->
+<FindBugsFilter>
+  <Match>
+    <!-- Uses tryWithResources, thus closes resource properly:
+    [ERROR] Medium: org.apache.rat.configuration.builders.ChildContainerBuilder.setResource(String) may fail to close stream
+    [org.apache.rat.configuration.builders.ChildContainerBuilder] At ChildContainerBuilder.java:[line 62] OS_OPEN_STREAM
+  -->
+    <Class name="org.apache.rat.configuration.builders.ChildContainerBuilder"/>
+    <Bug pattern="OS_OPEN_STREAM"/>
+  </Match>
+</FindBugsFilter>

pom.xml

@@ -308,8 +308,8 @@ agnostic home for software distribution comprehension and audit tools.
           <configuration>
             <!-- TODO remove after RAT-369 is done -->
             <failOnError>false</failOnError>
-            <!-- we only want to see our own problems -->
-            <onlyAnalyze>org.apache.rat.*</onlyAnalyze>
+            <!-- we only want to see our own problems and in all subpackages -->
+            <onlyAnalyze>org.apache.rat.-</onlyAnalyze>
             <excludeFilterFile>${basedir}/spotbugs_ignore.xml</excludeFilterFile>
             <plugins>
               <plugin>