diff -r 5315a5713dd5 -r b2e1b45382a4 src/net/java/otr4j/io/messages/AbstractMessage.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/java/otr4j/io/messages/AbstractMessage.java	Fri Apr 15 03:01:09 2011 +0200
@@ -0,0 +1,49 @@
+/*
+ * otr4j, the open source java otr library.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.otr4j.io.messages;
+
+/**
+ * 
+ * @author George Politis
+ */
+public abstract class AbstractMessage {
+	// Fields.
+	public int messageType;
+
+	// Ctor.
+	public AbstractMessage(int messageType) {
+		this.messageType = messageType;
+	}
+
+	// Methods.
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + messageType;
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		AbstractMessage other = (AbstractMessage) obj;
+		if (messageType != other.messageType)
+			return false;
+		return true;
+	}
+
+	// Unencoded
+	public static final int MESSAGE_ERROR = 0xff;
+	public static final int MESSAGE_QUERY = 0x100;
+	public static final int MESSAGE_PLAINTEXT = 0x102;
+}