diff --git a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Data.java b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Data.java
index 9b850c4153..d9e7434e0c 100644
--- a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Data.java
+++ b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Data.java
@@ -1,5 +1,7 @@
 package com.baeldung.concurrent.waitandnotify;
 
+import org.slf4j.Logger;
+
 public class Data {
     private String packet;
     
@@ -11,7 +13,9 @@ public class Data {
         while (transfer) {
             try {
                 wait();
-            } catch (InterruptedException e) {}
+            } catch (InterruptedException e) {
+                System.out.println("Thread Interrupted");
+            }
         }
         transfer = true;
 
@@ -23,7 +27,9 @@ public class Data {
         while (!transfer) {
             try { 
                 wait();
-            } catch (InterruptedException e) {}
+            } catch (InterruptedException e) {
+                System.out.println("Thread Interrupted");
+            }
         }
         transfer = false;
         
diff --git a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Receiver.java b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Receiver.java
index 63f48b8031..724e908a99 100644
--- a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Receiver.java
+++ b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Receiver.java
@@ -19,7 +19,9 @@ public class Receiver implements Runnable {
             //Thread.sleep() to mimic heavy server-side processing
             try {
                 Thread.sleep(ThreadLocalRandom.current().nextInt(1000, 5000));
-            } catch (InterruptedException e) {}
+            } catch (InterruptedException e) {
+                System.out.println("Thread Interrupted");
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Sender.java b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Sender.java
index b7d782c3f5..b4945b7b73 100644
--- a/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Sender.java
+++ b/core-java-concurrency/src/main/java/com/baeldung/concurrent/waitandnotify/Sender.java
@@ -11,11 +11,11 @@ public class Sender implements Runnable {
  
     public void run() {
         String packets[] = {
-            "First packet",
-            "Second packet",
-            "Third packet",
-            "Fourth packet",
-            "End"
+          "First packet",
+          "Second packet",
+          "Third packet",
+          "Fourth packet",
+          "End"
         };
  
         for (String packet : packets) {
@@ -24,7 +24,9 @@ public class Sender implements Runnable {
             //Thread.sleep() to mimic heavy server-side processing
             try {
                 Thread.sleep(ThreadLocalRandom.current().nextInt(1000, 5000));
-            } catch (InterruptedException e) {}
+            } catch (InterruptedException e) {
+                System.out.println("Thread Interrupted");
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/core-java-concurrency/src/test/java/com/baeldung/concurrent/waitandnotify/NetworkIntegrationTest.java b/core-java-concurrency/src/test/java/com/baeldung/concurrent/waitandnotify/NetworkIntegrationTest.java
index 49f4313e9d..8ecc92236e 100644
--- a/core-java-concurrency/src/test/java/com/baeldung/concurrent/waitandnotify/NetworkIntegrationTest.java
+++ b/core-java-concurrency/src/test/java/com/baeldung/concurrent/waitandnotify/NetworkIntegrationTest.java
@@ -13,38 +13,38 @@ import org.junit.Test;
 
 public class NetworkIntegrationTest {
 
-	private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
-	private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
-	private String expected;
-	
-	@Before
-	public void setUpStreams() {
-	    System.setOut(new PrintStream(outContent));
-	    System.setErr(new PrintStream(errContent));
-	}
-	
-	@Before
-	public void setUpExpectedOutput() {
-		StringWriter expectedStringWriter = new StringWriter();
-		
-		PrintWriter printWriter = new PrintWriter(expectedStringWriter);
-		printWriter.println("First packet");
-		printWriter.println("Second packet");
-		printWriter.println("Third packet");
-		printWriter.println("Fourth packet");
-		printWriter.close();
-		
-		expected = expectedStringWriter.toString();
-	}
+    private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+    private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
+    private String expected;
+    
+    @Before
+    public void setUpStreams() {
+        System.setOut(new PrintStream(outContent));
+        System.setErr(new PrintStream(errContent));
+    }
+    
+    @Before
+    public void setUpExpectedOutput() {
+        StringWriter expectedStringWriter = new StringWriter();
+        
+        PrintWriter printWriter = new PrintWriter(expectedStringWriter);
+        printWriter.println("First packet");
+        printWriter.println("Second packet");
+        printWriter.println("Third packet");
+        printWriter.println("Fourth packet");
+        printWriter.close();
+        
+        expected = expectedStringWriter.toString();
+    }
 
-	@After
-	public void cleanUpStreams() {
-	    System.setOut(null);
-	    System.setErr(null);
-	}
-	
-	@Test
-	public void givenSenderAndReceiver_whenSendingPackets_thenNetworkSynchronized() {
+    @After
+    public void cleanUpStreams() {
+        System.setOut(null);
+        System.setErr(null);
+    }
+    
+    @Test
+    public void givenSenderAndReceiver_whenSendingPackets_thenNetworkSynchronized() {
         Data data = new Data();
         Thread sender = new Thread(new Sender(data));
         Thread receiver = new Thread(new Receiver(data));
@@ -54,12 +54,12 @@ public class NetworkIntegrationTest {
         
         //wait for sender and receiver to finish before we test against expected
         try {
-			sender.join();
-			receiver.join();
-		} catch (InterruptedException e) {
-			e.printStackTrace();
-		}
-		
-	    assertEquals(expected, outContent.toString());
-	}
+            sender.join();
+            receiver.join();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        
+        assertEquals(expected, outContent.toString());
+    }
 }