Add convinient constructors for Message and Presence

smack-core/src/main/java/org/jivesoftware/smack/packet/Message.java

@@ -114,6 +114,18 @@ public final class Message extends Stanza implements TypedCloneable<Message> {
         this(JidCreate.from(to), body);
     }
 
+    /**
+     * Creates a new message with the specified recipient and extension element.
+     *
+     * @param to
+     * @param extensionElement
+     * @since 4.2
+     */
+    public Message(Jid to, ExtensionElement extensionElement) {
+        this(to);
+        addExtension(extensionElement);
+    }
+
     /**
      * Copy constructor.
      * <p>

smack-core/src/main/java/org/jivesoftware/smack/packet/Presence.java

@@ -24,6 +24,7 @@ import org.jivesoftware.smack.util.Objects;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.TypedCloneable;
 import org.jivesoftware.smack.util.XmlStringBuilder;
+import org.jxmpp.jid.Jid;
 
 /**
  * Represents XMPP presence packets. Every presence stanza(/packet) has a type, which is one of
@@ -78,6 +79,18 @@ public final class Presence extends Stanza implements TypedCloneable<Presence> {
         setType(type);
     }
 
+    /**
+     * Creates a new presence with the given type and using the given XMPP address as recipient.
+     *
+     * @param to the recipient.
+     * @param type the type.
+     * @since 4.2
+     */
+    public Presence(Jid to, Type type) {
+        this(type);
+        setTo(to);
+    }
+
     /**
      * Creates a new presence update with a specified status, priority, and mode.
      *