add javadoc

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

api/src/main/java/com/cloud/user/AccountService.java

@@ -85,6 +85,12 @@ User createUser(String userName, String password, String firstName, String lastN
 
     boolean isRootAdmin(Long accountId);
 
+    /**
+     * Checks if the given account has ROOT admin privileges.
+     *
+     * @param account the account to check
+     * @return true if the account is a ROOT admin, false otherwise
+     */
     boolean isRootAdmin(Account account);
 
     boolean isDomainAdmin(Long accountId);

server/src/main/java/com/cloud/user/AccountManagerImpl.java

@@ -606,7 +606,7 @@ public boolean isRootAdmin(Long accountId) {
     @Override
     public boolean isRootAdmin(Account account) {
         if (account == null) {
-            return false;  //account is deleted or does not exist
+            return false;
         }
         for (SecurityChecker checker : _securityCheckers) {
             try {