style: enable TypeName in checkstyle.xml

Author: SAIVARDHAN15

checkstyle.xml

@@ -117,7 +117,10 @@
     <!-- TODO <module name="ParameterName"/> -->
     <module name="StaticVariableName"/>
     <!-- TODO <module name="TypeName"/> -->
-
+    <module name="TypeName">
+    <property name="format" value="^[A-Z][a-zA-Z0-9]*$"/>
+    <property name="severity" value="warning"/>
+    </module>
     <!-- Checks for imports                              -->
     <!-- See https://checkstyle.org/checks/imports/index.html -->
     <module name="AvoidStarImport"/>

exampleClass.java

@@ -0,0 +1,5 @@
+public class exampleClass {
+    public static void main(String[] args) {
+        System.out.println("Hello, Checkstyle!");
+    }
+}