Activate checkstyle and add missing license headers

Delete also all "All rights reserved" statements, as they are
unnecessary and conflict with checkstyle's header check. Delete unused
imports.

core/src/test/java/org/jivesoftware/smack/ChatConnectionTest.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2010 Jive Software.
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *
@@ -28,7 +28,6 @@ import org.jivesoftware.smack.ChatManager.MatchMode;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.Message.Type;
 import org.jivesoftware.smack.packet.Packet;
-import org.jivesoftware.smack.packet.PacketExtension;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Ignore;
@@ -337,6 +336,7 @@ public class ChatConnectionTest {
         assertNull(listener.getNewChat());
     }
 
+    @SuppressWarnings("unused")
     private ChatManager getChatManager(boolean includeNormal, MatchMode mode) {
         ChatManager cm = getConnection().getChatManager();
         cm.setMatchMode(mode);
@@ -428,6 +428,7 @@ public class ChatConnectionTest {
             counter++;
         }
         
+        @SuppressWarnings("unused")
         public Chat getChat() {
             return msgChat;
         }

core/src/test/java/org/jivesoftware/smack/DefaultRosterStoreTest.java

@@ -1,5 +1,8 @@
 /**
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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
  *
@@ -11,7 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.jivesoftware.smack;
 
 import static org.junit.Assert.assertEquals;

core/src/test/java/org/jivesoftware/smack/DummyConnection.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2010 Jive Software.
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *
@@ -30,7 +30,6 @@ import org.jivesoftware.smack.ConnectionListener;
 import org.jivesoftware.smack.PacketCollector;
 import org.jivesoftware.smack.Roster;
 import org.jivesoftware.smack.XMPPException;
-import org.jivesoftware.smack.Connection.ListenerWrapper;
 import org.jivesoftware.smack.packet.Packet;
 import org.jivesoftware.smack.packet.Presence;
 

core/src/test/java/org/jivesoftware/smack/PacketCollectorTest.java

@@ -1,3 +1,19 @@
+/**
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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.
+ */
 package org.jivesoftware.smack;
 
 import static org.junit.Assert.assertEquals;

core/src/test/java/org/jivesoftware/smack/RosterOfflineTest.java

@@ -1,6 +1,8 @@
 /**
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Copyright the original author or authors
+ *
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/RosterTest.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2010 Jive Software.
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/RosterVersioningTest.java

@@ -1,5 +1,8 @@
 /**
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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
  *
@@ -11,7 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.jivesoftware.smack;
 
 import static org.junit.Assert.assertEquals;

core/src/test/java/org/jivesoftware/smack/SmackConfigurationTest.java

@@ -1,3 +1,19 @@
+/**
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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.
+ */
 package org.jivesoftware.smack;
 
 import static org.junit.Assert.fail;

core/src/test/java/org/jivesoftware/smack/ThreadedDummyConnection.java

@@ -1,6 +1,8 @@
 /**
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Copyright the original author or authors
+ *
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/filters/FromMatchesFilterTest.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2011 Robin Collier
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/packet/IQResponseTest.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2010 Jive Software.
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/packet/MessageTest.java

@@ -1,7 +1,18 @@
 /**
  *
- * Copyright (C) 2007 Jive Software. All rights reserved.
- * This software is the proprietary information of Jive Software. Use is subject to license terms.
+ * Copyright (C) 2007 Jive Software.
+ *
+ * Licensed 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.
  */
 package org.jivesoftware.smack.packet;
 

core/src/test/java/org/jivesoftware/smack/packet/PresenceTest.java

@@ -1,7 +1,18 @@
 /**
  *
- * Copyright (C) 2007 Jive Software. All rights reserved.
- * This software is the proprietary information of Jive Software. Use is subject to license terms.
+ * Copyright (C) 2007 Jive Software.
+ *
+ * Licensed 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.
  */
 package org.jivesoftware.smack.packet;
 

core/src/test/java/org/jivesoftware/smack/packet/StreamErrorTest.java

@@ -1,3 +1,19 @@
+/**
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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.
+ */
 package org.jivesoftware.smack.packet;
 
 import static org.junit.Assert.*;

core/src/test/java/org/jivesoftware/smack/parsing/ParsingExceptionTest.java

@@ -1,3 +1,19 @@
+/**
+ *
+ * Copyright the original author or authors
+ *
+ * Licensed 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.
+ */
 package org.jivesoftware.smack.parsing;
 
 import static org.junit.Assert.assertEquals;

core/src/test/java/org/jivesoftware/smack/test/util/TestUtils.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2013 Robin Collier
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *

core/src/test/java/org/jivesoftware/smack/util/PacketParserUtilsTest.java

@@ -1,24 +1,31 @@
 /**
  *
- * Copyright (C) 2007 Jive Software. All rights reserved.
- * This software is the proprietary information of Jive Software. Use is subject to license terms.
+ * Copyright (C) 2007 Jive Software.
+ *
+ * Licensed 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.
  */
 package org.jivesoftware.smack.util;
 
 import static junit.framework.Assert.assertEquals;
 import static junit.framework.Assert.assertFalse;
-import static junit.framework.Assert.assertNotNull;
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.assertTrue;
 import static junit.framework.Assert.fail;
 import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
 import static org.custommonkey.xmlunit.XMLAssert.assertXMLNotEqual;
 
-import java.util.Calendar;
-import java.util.Date;
 import java.util.Locale;
 import java.util.Properties;
-import java.util.TimeZone;
 
 import org.custommonkey.xmlunit.DetailedDiff;
 import org.custommonkey.xmlunit.Diff;
@@ -43,6 +50,7 @@ public class PacketParserUtilsTest {
         outputProperties.put(javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION, "yes");
     }
         
+    @SuppressWarnings("deprecation")
     @Test
     public void singleMessageBodyTest() throws Exception {
         String defaultLanguage = Packet.getDefaultLanguage();
@@ -192,6 +200,7 @@ public class PacketParserUtilsTest {
 
     }
 
+    @SuppressWarnings("deprecation")
     @Test
     public void singleMessageSubjectTest() throws Exception {
         String defaultLanguage = Packet.getDefaultLanguage();
@@ -341,6 +350,7 @@ public class PacketParserUtilsTest {
 
     }
 
+    @SuppressWarnings("deprecation")
     @Test
     public void multipleMessageBodiesTest() throws Exception {
         String defaultLanguage = Packet.getDefaultLanguage();
@@ -494,6 +504,7 @@ public class PacketParserUtilsTest {
 
     }
 
+    @SuppressWarnings("deprecation")
     @Test
     public void multipleMessageSubjectsTest() throws Exception {
         String defaultLanguage = Packet.getDefaultLanguage();
@@ -647,6 +658,7 @@ public class PacketParserUtilsTest {
 
     }
 
+    @SuppressWarnings("deprecation")
     @Ignore // gradle migration
     @Test
     public void invalidMessageBodyContainingTagTest() throws Exception {
@@ -681,6 +693,7 @@ public class PacketParserUtilsTest {
         
     }
 
+    @SuppressWarnings("deprecation")
     @Test
     public void invalidXMLInMessageBody() throws Exception {
         String validControl = XMLBuilder.create("message")
@@ -756,6 +769,7 @@ public class PacketParserUtilsTest {
     	assertXMLEqual(stanza, presence.toXML());
     }
     
+    @SuppressWarnings("deprecation")
     @Test
     public void validatePresenceProbe() throws Exception {
     	String stanza = "<presence from='mercutio@example.com' id='xv291f38' to='juliet@example.com' type='unsubscribed'/>";
@@ -766,6 +780,7 @@ public class PacketParserUtilsTest {
     	assertEquals(Presence.Type.unsubscribed, presence.getType());
     }
     
+    @SuppressWarnings("deprecation")
     @Test
     public void validatePresenceOptionalElements() throws Exception {
     	String stanza = "<presence xml:lang='en' type='unsubscribed'>"
@@ -814,6 +829,7 @@ public class PacketParserUtilsTest {
 //    	assertEquals(cal.getTime(), delay.getStamp());
 //    }
 
+    @SuppressWarnings("deprecation")
     @Ignore // gradle migration
     @Test
     public void parsePresenceWithInvalidDelayedDelivery() throws Exception {

core/src/test/java/org/jivesoftware/smack/util/StringUtilsTest.java

@@ -2,7 +2,7 @@
  *
  * Copyright 2003-2007 Jive Software.
  *
- * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
+ * Licensed 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
  *