Add missing namespace and XSD to SpotBugs filter file.
diff --git a/conf/findbugs-exclude-filter.xml b/conf/findbugs-exclude-filter.xml
index 5ffb16c..5c9949d 100644
--- a/conf/findbugs-exclude-filter.xml
+++ b/conf/findbugs-exclude-filter.xml
@@ -1,41 +1,44 @@
-<?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>
-
- <!-- the javadoc states that the default character encoding is used -->
- <!-- when converting a string into a byte[] -->
- <Match>
- <Class name="org.apache.commons.mail.util.MimeMessageUtils" />
- <Method name="createMimeMessage" params="javax.mail.Session, java.lang.String" returns="javax.mail.internet.MimeMessage" />
- <Bug pattern="DM_DEFAULT_ENCODING" />
- </Match>
-
- <!-- printStackTrace is supposed to use the default character encoding -->
- <Match>
- <Class name="org.apache.commons.mail.EmailException" />
- <Method name="printStackTrace" params="java.io.PrintStream" returns="void" />
- <Bug pattern="DM_DEFAULT_ENCODING" />
- </Match>
-
-</FindBugsFilter>
+<?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
+ xmlns="https://github.com/spotbugs/filter/3.0.0"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="https://github.com/spotbugs/filter/3.0.0 https://raw.githubusercontent.com/spotbugs/spotbugs/3.1.0/spotbugs/etc/findbugsfilter.xsd"><!-- N.B. Using wild-card class names so exclusions work regardless of the top-level package -->
+
+ <!-- the javadoc states that the default character encoding is used -->
+ <!-- when converting a string into a byte[] -->
+ <Match>
+ <Class name="org.apache.commons.mail.util.MimeMessageUtils" />
+ <Method name="createMimeMessage" params="javax.mail.Session, java.lang.String" returns="javax.mail.internet.MimeMessage" />
+ <Bug pattern="DM_DEFAULT_ENCODING" />
+ </Match>
+
+ <!-- printStackTrace is supposed to use the default character encoding -->
+ <Match>
+ <Class name="org.apache.commons.mail.EmailException" />
+ <Method name="printStackTrace" params="java.io.PrintStream" returns="void" />
+ <Bug pattern="DM_DEFAULT_ENCODING" />
+ </Match>
+
+</FindBugsFilter>
