add packet structure

ChatApp/src/network/protocol/packets/ChatMessagePacket.java

@@ -0,0 +1,40 @@
+package network.protocol.packets;
+
+import java.time.Instant;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class ChatMessagePacket extends Packet {
+
+	static private final long serialVersionUID = Packets.Login.ordinal();
+
+	private final Instant time;
+	private final String chatter;
+	private final String content;
+
+	public ChatMessagePacket(Instant time, String chatter, String content) {
+		this.time = time;
+		this.chatter = chatter;
+		this.content = content;
+	}
+
+	public Instant getTime() {
+		return time;
+	}
+
+	public String getChatter() {
+		return chatter;
+	}
+
+	public String getContent() {
+		return content;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}