Coding gudilines for class and methods javadocs fixed.

Change-Id: I0153e6391c9ec9eacaac65c3989834b6bf5c65bf
diff --git a/src/main/java/org/onosproject/yangutils/utils/io/impl/YangFileScanner.java b/src/main/java/org/onosproject/yangutils/utils/io/impl/YangFileScanner.java
index 412aefd..6da8bcd 100644
--- a/src/main/java/org/onosproject/yangutils/utils/io/impl/YangFileScanner.java
+++ b/src/main/java/org/onosproject/yangutils/utils/io/impl/YangFileScanner.java
@@ -23,7 +23,7 @@
 import java.util.Stack;
 
 /**
- * Provides utility for searching the files in a directory.
+ * Represents utility for searching the files in a directory.
  */
 public final class YangFileScanner {
 
@@ -31,7 +31,7 @@
     private static final String YANG_FILE_EXTENTION = ".yang";
 
     /**
-     * Default constructor.
+     * Creates an instance of YANG file scanner.
      */
     private YangFileScanner() {
     }