Add javadocs

src/main/java/me/goudham/Contents.java

@@ -26,7 +26,7 @@ enum Contents {
     private final DataFlavor dataFlavor;
 
     Contents(DataFlavor dataFlavor) {
-       this.dataFlavor = dataFlavor;
+        this.dataFlavor = dataFlavor;
     }
 
     DataFlavor getDataFlavor() {

src/main/java/me/goudham/EventManager.java

@@ -75,7 +75,7 @@ class EventManager {
      * Produces {@link String} change notifications to all consumers listening
      *
      * @param clipboardContent The previous clipboard contents
-     * @param stringContent       {@link String} to be consumed
+     * @param stringContent    {@link String} to be consumed
      */
     void notifyTextEvent(ClipboardContent clipboardContent, String stringContent) {
         for (TextEvent textEvent : textEventListener) {
@@ -87,7 +87,7 @@ class EventManager {
      * Produces {@link BufferedImage} change notifications to all consumers listening
      *
      * @param clipboardContent The previous clipboard contents
-     * @param imageContent        {@link BufferedImage} to be consumed
+     * @param imageContent     {@link BufferedImage} to be consumed
      */
     void notifyImageEvent(ClipboardContent clipboardContent, BufferedImage imageContent) {
         for (ImageEvent imageEvent : imageEventListener) {
@@ -99,7 +99,7 @@ class EventManager {
      * Produces {@link List} of {@link File} change notifications to all consumers listening
      *
      * @param clipboardContent The previous clipboard contents
-     * @param fileContent         {@link List} of {@link File} to be consumed
+     * @param fileContent      {@link List} of {@link File} to be consumed
      */
     void notifyFilesEvent(ClipboardContent clipboardContent, List<File> fileContent) {
         for (FileEvent fileEvent : fileEventListener) {

src/main/java/me/goudham/WindowsOrUnixClipboardListener.java

@@ -44,6 +44,8 @@ class WindowsOrUnixClipboardListener extends ClipboardListener implements Runnab
     }
 
     /**
+     * Detect changes from the given {@link Clipboard} and send event notifications to all users listening
+     *
      * @param oldClipboard         The clipboard that is no longer owned
      * @param oldClipboardContents The old contents of the clipboard
      * @param newClipboardContents The new contents of the clipboard