diff --git a/pom.xml b/pom.xml
index c6016e6238..e088c054bc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,6 +38,10 @@
         </license>
     </licenses>
 
+    <modules>
+        <module>toolkits</module>
+    </modules>
+
     <properties>
         <!-- Generic properties -->
         <java.version>11</java.version>
@@ -75,8 +79,8 @@
         <!-- LOG -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-slf4j-impl</artifactId>
-            <version>2.11.0</version>
+            <artifactId>log4j-slf4j18-impl</artifactId>
+            <version>2.14.0</version>
         </dependency>
 
         <!-- APACHE COMMONS -->
@@ -305,6 +309,7 @@
         </plugins>
     </build>
 
+
     <distributionManagement>
         <snapshotRepository>
             <id>ossrh</id>
diff --git a/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/DataStructureTest.java b/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/DataStructureTest.java
new file mode 100644
index 0000000000..317b878e4b
--- /dev/null
+++ b/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/DataStructureTest.java
@@ -0,0 +1,64 @@
+package com.ossez.toolkits.codebank.tests;
+
+import junit.framework.TestCase;
+import org.junit.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.TestInstance;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Object of VariableOssez
+ * 
+ * @author YuCheng
+ *
+ */
+
+class OssezVariable {
+	int s1, s2;
+	static int s3;
+
+	OssezVariable(int x, int y, int z) {
+		s1 = x;
+		s2 = y;
+		s3 = z;
+	}
+}
+
+/**
+ * @author YuCheng Hu
+ */
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+public class DataStructureTest{
+
+	private final static Logger logger = LoggerFactory.getLogger(DataStructureTest.class);
+
+
+	@BeforeAll
+	protected void setUp() throws Exception {
+	}
+
+	@AfterAll
+	protected void tearDown() throws Exception {
+	}
+
+
+	/**
+	 * Do RetsServerConnection Test
+	 */
+	@Test
+	public void testArrayDataStructure() {
+
+		int[] intArraySize = new int[3];
+		Integer intArrayW[] = new Integer[3];
+		logger.debug("Array Size - [{}]", intArraySize.length);
+		logger.debug("Array Size - [{}]", intArrayW.length);
+
+		int[] intArrayValue = {1,2,3};
+		String[] strArray = {"COM","OSSEZ","US"};
+		logger.debug("Array Size - [{}]", intArrayValue.length);
+
+	}
+
+}
diff --git a/toolkits/codebank/src/test/resources/log4j2.xml b/toolkits/codebank/src/test/resources/log4j2.xml
index f87d408794..a6b365831f 100644
--- a/toolkits/codebank/src/test/resources/log4j2.xml
+++ b/toolkits/codebank/src/test/resources/log4j2.xml
@@ -7,10 +7,11 @@
     </Appenders>
     <Loggers>
         <Logger name="com.ossez" level="trace">
-            <AppenderRef ref="Console"/>
+            <AppenderRef ref="Console" />
         </Logger>
-        <Root level="error">
-            <AppenderRef ref="Console"/>
+
+        <Root level="all">
+
         </Root>
     </Loggers>
 </Configuration>
\ No newline at end of file