diff --git a/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/exceptions/YdtException.java b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/exceptions/YdtException.java
new file mode 100644
index 0000000..db21976
--- /dev/null
+++ b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/exceptions/YdtException.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yms.app.ydt.exceptions;
+
+/**
+ * Represents base class for exceptions in YDT operations.
+ */
+public class YdtException extends RuntimeException {
+
+    private static final long serialVersionUID = 20160211L;
+
+    /**
+     * Creates a new YDT exception with given message.
+     *
+     * @param message the detail of exception in string
+     */
+    public YdtException(String message) {
+        super(message);
+    }
+
+    /**
+     * Creates a new YDT exception from given message and cause.
+     *
+     * @param message the detail of exception in string
+     * @param cause   underlying cause of the error
+     */
+    public YdtException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * Creates a new YDT exception from cause.
+     *
+     * @param cause underlying cause of the error
+     */
+    public YdtException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Creates a new YDT exception from given parameters.
+     *
+     * @param keyword identify error scenario whether it is many or few
+     * @param name    name of the node
+     * @param count   supported count value
+     */
+    public YdtException(String keyword, String name, int count) {
+        super("Too " + keyword + " key parameter in " + name + ". Expected " +
+                      "count " + count + ".");
+    }
+}