Fix Javadoc errors
diff --git a/src/main/java/org/apache/neethi/All.java b/src/main/java/org/apache/neethi/All.java
index fae3e01..c29fbd3 100644
--- a/src/main/java/org/apache/neethi/All.java
+++ b/src/main/java/org/apache/neethi/All.java
@@ -46,7 +46,7 @@
     }
 
     /**
-     * Returns a <tt>List</tt> of it's PolicyComponents.
+     * Returns a {@link List} of it's PolicyComponents.
      * 
      * @return a List of it's PolicyComponents
      */
diff --git a/src/main/java/org/apache/neethi/Policy.java b/src/main/java/org/apache/neethi/Policy.java
index e2104a2..1da0034 100644
--- a/src/main/java/org/apache/neethi/Policy.java
+++ b/src/main/java/org/apache/neethi/Policy.java
@@ -68,8 +68,8 @@
     }
 
     /**
-     * Returns a Normalized version of self. If <tt>deep</tt> is set
-     * <tt>false</tt> then the assertions are not normalized and it returns a
+     * Returns a Normalized version of self. If {@code deep} is set
+     * {@code false} then the assertions are not normalized and it returns a
      * partially normalized version of self.
      * 
      * @param deep
@@ -81,8 +81,8 @@
     }
 
     /**
-     * Returns a normalized version of self.If <tt>deep</tt> is set
-     * <tt>false</tt> then the assertions are not normalized and it returns a
+     * Returns a normalized version of self.If {@code deep} is set
+     * {@code false} then the assertions are not normalized and it returns a
      * partially normalized version of self.
      * 
      * @param reg
@@ -217,9 +217,9 @@
 
     /**
      * Returns an Iterator that will return a list of assertions correspond to a
-     * Policy alternative if any. The <tt>iterator.next()</tt> will return a
+     * Policy alternative if any. The {@code iterator.next()} will return a
      * list of assertions correspond to a Policy alternative if any and
-     * <tt>iterator.hasNext()</tt> will indicates whether there is another
+     * {@code iterator.hasNext()} will indicates whether there is another
      * Policy alternative.
      * 
      * @return An iterator over the list of alternatives
@@ -276,7 +276,7 @@
 
     /**
      * Returns the value of the attribute specified by the QName. Returns
-     * <tt>null</tt> if not present.
+     * {@code null} if not present.
      * 
      * @param name
      *            the QName of the attribute
@@ -287,7 +287,7 @@
     }
 
     /**
-     * Returns a <tt>Map</tt> of all attributes of self.
+     * Returns a {@link Map} of all attributes of self.
      * 
      * @return a Map of all attributes of self
      */
@@ -296,7 +296,7 @@
     }
 
     /**
-     * Sets the <tt>Name</tt> attribute of self.
+     * Sets the {@code Name} attribute of self.
      * 
      * @param name
      *            the Name attribute of self
@@ -306,7 +306,7 @@
     }
 
     /**
-     * Returns the <tt>Name</tt> attribute of self.
+     * Returns the {@code Name} attribute of self.
      * 
      * @return the Name attribute of self
      */
diff --git a/src/main/java/org/apache/neethi/PolicyReference.java b/src/main/java/org/apache/neethi/PolicyReference.java
index a2325c2..ea62c93 100644
--- a/src/main/java/org/apache/neethi/PolicyReference.java
+++ b/src/main/java/org/apache/neethi/PolicyReference.java
@@ -89,7 +89,7 @@
     
     /**
      * Returns normalized version of the Policy that is referred by self. The specified 
-     * PolicyRegistry is used to lookup for the Policy that is referred and <tt>deep</tt> 
+     * PolicyRegistry is used to lookup for the Policy that is referred and {@code deep} 
      * indicates the level of normalization for the returning Policy.
      * 
      * @param reg the PolicyRegistry that is used to resolved the Policy referred by self
diff --git a/src/main/java/org/apache/neethi/util/PolicyComparator.java b/src/main/java/org/apache/neethi/util/PolicyComparator.java
index 2eb2eb5..0c173f6 100644
--- a/src/main/java/org/apache/neethi/util/PolicyComparator.java
+++ b/src/main/java/org/apache/neethi/util/PolicyComparator.java
@@ -38,13 +38,13 @@
     }
 
     /**
-     * Returns <tt>true</tt> if the two policies have the same semantics
+     * Returns {@code true} if the two policies have the same semantics
      * 
      * @param arg1
      *            a Policy
      * @param arg2
      *            an another Policy
-     * @return <tt>true</tt> if both policies have the same semantics
+     * @return {@code true} if both policies have the same semantics
      */
     public static boolean compare(Policy arg1, Policy arg2) {
         
@@ -83,14 +83,14 @@
     }
 
     /**
-     * Returns <tt>true</tt> if the two PolicyComponents have the same
+     * Returns {@code true} if the two PolicyComponents have the same
      * semantics.
      * 
      * @param arg1
      *            a PolicyComponent
      * @param arg2
      *            an another PolicyComponent
-     * @return <tt>true</tt> if both PolicyComponents have the same semantics
+     * @return {@code true} if both PolicyComponents have the same semantics
      */
     public static boolean compare(PolicyComponent arg1, PolicyComponent arg2) {
         if (!arg1.getClass().equals(arg2.getClass())) {