print stack trace on error

src/de/tudarmstadt/informatik/hostage/sync/wifi_direct/UI/WiFiP2pSyncActivity.java

@@ -242,7 +242,7 @@ public class WiFiP2pSyncActivity extends Activity implements AdapterView.OnItemC
             ((WiFiPeerListAdapter) mLstP2PDevices.getAdapter()).notifyDataSetChanged();
             mDevice = null;
             this.refreshDeviceList(new ArrayList<WifiP2pDevice>());
-            
+
             Toast.makeText(this, "WiFi Direct P2P is disabled.", Toast.LENGTH_LONG).show();
         }
     }

src/de/tudarmstadt/informatik/hostage/sync/wifi_direct/WiFiP2pClientTask.java

@@ -87,6 +87,7 @@ public class WiFiP2pClientTask extends BackgroundTask {
                 try {
                     Thread.sleep(seconds_to_wait * 1000);
                 } catch (InterruptedException ie){
+                    ie.printStackTrace();
                 }
             } finally {
                 if (socket != null) {