diff --git a/core-java-modules/core-java-lang-5/pom.xml b/core-java-modules/core-java-lang-5/pom.xml
index 549f307aee..767ebb6e35 100644
--- a/core-java-modules/core-java-lang-5/pom.xml
+++ b/core-java-modules/core-java-lang-5/pom.xml
@@ -14,6 +14,11 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
     
+    <properties>
+        <commons-lang3.version>3.12.0</commons-lang3.version>
+        <reflections.version>0.10.2</reflections.version>
+    </properties>
+    
 
     <build>
         <finalName>core-java-lang-5</finalName>
@@ -29,13 +34,13 @@
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.12.0</version>
+            <version>${commons-lang3.version}</version>
         </dependency>
     
         <dependency>
             <groupId>org.reflections</groupId>
             <artifactId>reflections</artifactId>
-            <version>0.10.2</version>
+            <version>${reflections.version}</version>
         </dependency>
     </dependencies>
     
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass1.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass1.java
similarity index 61%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass1.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass1.java
index 414f421da3..fb91223a97 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass1.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass1.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public class ChildClass1 implements ChildInterface1 {
 
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass2.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass2.java
similarity index 61%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass2.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass2.java
index 568c7b57c7..2d5958784d 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildClass2.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildClass2.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public class ChildClass2 implements ChildInterface2 {
 
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface1.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface1.java
similarity index 63%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface1.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface1.java
index 02f87d1901..8a2ad5f345 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface1.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface1.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public interface ChildInterface1 extends MasterInterface {
 
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface2.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface2.java
similarity index 63%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface2.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface2.java
index 80a5915b27..cff662edf0 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/ChildInterface2.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/ChildInterface2.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public interface ChildInterface2 extends MasterInterface {
 
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterClass.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterClass.java
similarity index 61%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterClass.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterClass.java
index 133e8bb0a7..29f3ed5fe8 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterClass.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterClass.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public class MasterClass implements MasterInterface {
 
diff --git a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterInterface.java b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterInterface.java
similarity index 51%
rename from core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterInterface.java
rename to core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterInterface.java
index 554816df4d..6aefb8b6e6 100644
--- a/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkInterface/MasterInterface.java
+++ b/core-java-modules/core-java-lang-5/src/main/java/com/baeldung/checkinterface/MasterInterface.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 public interface MasterInterface {
 
diff --git a/core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkInterface/CheckInterfaceUnitTest.java b/core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkinterface/CheckInterfaceUnitTest.java
similarity index 95%
rename from core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkInterface/CheckInterfaceUnitTest.java
rename to core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkinterface/CheckInterfaceUnitTest.java
index 3a1f8ff2b6..3accef0869 100644
--- a/core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkInterface/CheckInterfaceUnitTest.java
+++ b/core-java-modules/core-java-lang-5/src/test/java/com/baeldung/checkinterface/CheckInterfaceUnitTest.java
@@ -1,4 +1,4 @@
-package com.baeldung.checkInterface;
+package com.baeldung.checkinterface;
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -13,6 +13,10 @@ import org.junit.jupiter.api.Test;
 import org.reflections.ReflectionUtils;
 import org.reflections.Reflections;
 
+import com.baeldung.checkinterface.ChildClass2;
+import com.baeldung.checkinterface.ChildInterface2;
+import com.baeldung.checkinterface.MasterInterface;
+
 public class CheckInterfaceUnitTest {
     
     protected static Reflections reflections;