Adicionando o plugin corretamente

pitiupi/.gitignore

@@ -8,3 +8,5 @@
 
 # JARs gerados
 *.jar
+
+.idea/

pitiupi/src/pitiupi/GUI/MainWindow.java

@@ -135,10 +135,14 @@ public class MainWindow extends javax.swing.JFrame {
         return this.port;
     }
 
-    public SocketUDP getSocket() {
+    public SocketUDP getSocketUDP() {
         return this.socketUDP;
     }
 
+    public  SocketTCP getSocketTCP() {
+        return this.socketTCP;
+    }
+
     public List<Plugin> getPlugins() {
         return plugins;
     }

pitiupi/src/pitiupi/control/HeartbeatManager.java

@@ -66,7 +66,7 @@ public class HeartbeatManager {
     private void announce() {
         try {
             HeartbeatMessage msg = new HeartbeatMessage(mainWindow.getUserName(), instanceId);
-            mainWindow.getSocket().sendMulticast(msg.toByteArray());
+            mainWindow.getSocketUDP().sendMulticast(msg.toByteArray());
         } catch (IOException ex) {
             Logger.getLogger(HeartbeatManager.class.getName()).log(Level.WARNING, "Falha ao enviar heartbeat", ex);
         }