Add Copyright comments

Author: abhargav-mw

src/main/java/com/mathworks/ci/MatlabBuildWrapperContent.java

@@ -1,5 +1,12 @@
 package com.mathworks.ci;
 
+/**
+ * Copyright 2020 The MathWorks, Inc.
+ *
+ * Class to parse Stapler request for Use MATLAB Version build wrapper.
+ *
+ */
+
 import org.kohsuke.stapler.DataBoundConstructor;
 
 public class MatlabBuildWrapperContent {

src/main/java/com/mathworks/ci/MatlabInstallation.java

@@ -1,5 +1,12 @@
 package com.mathworks.ci;
 
+/**
+ * Copyright 2020 The MathWorks, Inc.
+ *
+ * Describable class for adding MATLAB installations in Jenkins Global Tool configuration.
+ *
+ */
+
 import hudson.CopyOnWrite;
 import hudson.EnvVars;
 import hudson.Extension;

src/main/java/com/mathworks/ci/MatlabInstallationAxis.java

@@ -1,5 +1,13 @@
 package com.mathworks.ci;
 
+/**
+ * Copyright 2020 The MathWorks, Inc.
+ *
+ * Describable class for MATLAB Axis that provides a list of configured MATLAB installation for
+ * generating matrix configurations.
+ *
+ */
+
 import hudson.Extension;
 import hudson.matrix.Axis;
 import hudson.matrix.AxisDescriptor;

src/main/java/com/mathworks/ci/MatlabItemListener.java

@@ -1,5 +1,13 @@
 package com.mathworks.ci;
 
+/**
+ * Copyright 2020 The MathWorks, Inc.
+ *
+ * Item listener class to provide functionality to check UI element states for a
+ * Multi-configuration project.
+ *
+ */
+
 import hudson.Extension;
 import hudson.matrix.MatrixConfiguration;
 import hudson.matrix.MatrixProject;
@@ -13,7 +21,6 @@
 import java.util.List;
 import java.util.Map;
 
-
 @Extension
 public final class MatlabItemListener extends ItemListener {
     private static final Map<String, Boolean> prjCheckMATLABAxis = new HashMap<>();