MySQL backup problem

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Java

Hello gyus!
I am using sqldump to take backup of my sql database using code bellow:
where final path = destination path and name

String cmd = "mysqldump -u"+databaseUserName+" "+"-p"+databasePassword
                       +" "+databaseName+" "+"-r"+finalPath+".sql";
               Process run = Runtime.getRuntime().exec(cmd);
               int complete = run.waitFor();
               if (complete == 0)//return zero if sucess full
               {
                   //if process is sucess full
               
                
                         statuse_lbl.setText("Opration Successfull...!");
               } else {
                    String completeTime =dateFormat.format(calender.getTime());
                    //if process is not sucessfull
                     do something 
                              
                       
               }

Now problem is that when i take backup on partition C:\ or E:\ it is successful, But when i try to take backup on further directory i-e C:\backup or C:\someFolder or E:\someFolder Then it fails.

Please help me to solve this problem.
Thanks