Implements helper function for serialization

src/main/java/CredentialRepository.java

@@ -1,3 +1,7 @@
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
 import java.util.ArrayList;
 
 /**
@@ -128,6 +132,25 @@ public class CredentialRepository implements CredentialRepositoryInterface{
 
     }
 
+    /**
+     * Function for serialization of all Credentials
+     * @param fileName
+     */
+
+    public void serializeObject(String fileName)
+    {
+        if(fileName.equals("")) return;
+
+        try {
+            FileOutputStream file = new FileOutputStream(this.getWorkingDirectory() + fileName + ".claud11");
+            ObjectOutputStream out = new ObjectOutputStream(file);
+            out.writeObject(this.credentials);
+        } catch (Exception fail) {
+            System.err.println("Serialization failed!");
+        }
+    }
+
+
     /**
      * helper function to check list size after insertion / deletion
      * @return