address most issues detected by findbugs

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1154667 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/findbugs-exclude-filter.xml b/findbugs-exclude-filter.xml
new file mode 100644
index 0000000..5d67666
--- /dev/null
+++ b/findbugs-exclude-filter.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0"?>
+<!--
+   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.
+-->
+
+<!--
+  This file contains some false positive bugs detected by findbugs. Their
+  false positive nature has been analyzed individually and they have been
+  put here to instruct findbugs it must ignore them.
+-->
+<FindBugsFilter>
+
+  <!-- Reason: References to System.out/err == -->
+  <Match>
+    <Class name="org.apache.commons.compress.archivers.Lister" />
+    <Or>
+      <Method name="main" />
+      <Method name="usage" />
+    </Or>
+    <Bug pattern="NP_ALWAYS_NULL" />
+  </Match>
+  <Match>
+    <Class name="org.apache.commons.compress.archivers.zip.ZipFile" />
+    <Method name="finalize" />
+    <Bug pattern="NP_ALWAYS_NULL" />
+  </Match>
+
+  <!-- Reason: fallthrough is intended -->
+  <Match>
+    <Class name="org.apache.commons.compress.archivers.zip.ExtraFieldUtils" />
+    <Method name="parse" />
+    <Bug pattern="SF_SWITCH_FALLTHROUGH" />
+  </Match>
+
+  <!-- Reason: fields unused as documented -->
+  <Match>
+    <Class name="org.apache.commons.compress.archivers.jar.JarArchiveEntry" />
+    <Or>
+      <Field name="certificates"/>
+      <Field name="manifestAttributes"/>
+    </Or>
+    <Bug pattern="UWF_NULL_FIELD" />
+  </Match>
+
+  <!-- Reason: exception in close swallowed in order to re-throw original -->
+  <Match>
+    <Class name="org.apache.commons.compress.archivers.zip.ZipFile" />
+    <Method name="&lt;init&gt;" />
+    <Bug pattern="DE_MIGHT_IGNORE" />
+  </Match>
+
+</FindBugsFilter>