diff --git a/src/main/java/com/dispose/common/AuthConfigValue.java b/src/main/java/com/dispose/common/AuthConfigValue.java
index 7640c964..627cc3b8 100644
--- a/src/main/java/com/dispose/common/AuthConfigValue.java
+++ b/src/main/java/com/dispose/common/AuthConfigValue.java
@@ -41,4 +41,9 @@ public class AuthConfigValue {
      * The constant AUTH_WHITE_LIST_CHECK.
      */
     public static volatile boolean AUTH_WHITE_LIST_CHECK = true;
+
+    /**
+     * Instantiates a new Auth config value.
+     */
+    private AuthConfigValue() {}
 }
diff --git a/src/main/java/com/dispose/common/ConstValue.java b/src/main/java/com/dispose/common/ConstValue.java
index acaa86c1..db0821b5 100644
--- a/src/main/java/com/dispose/common/ConstValue.java
+++ b/src/main/java/com/dispose/common/ConstValue.java
@@ -100,4 +100,8 @@ public class ConstValue {
         return ConstValue.IP_ADDR_SEGMENT_REG;
     }
 
+    /**
+     * Instantiates a new Const value.
+     */
+    private ConstValue() {}
 }
diff --git a/src/main/java/com/dispose/common/DisposeConfigValue.java b/src/main/java/com/dispose/common/DisposeConfigValue.java
index 797f4d09..857b3c70 100644
--- a/src/main/java/com/dispose/common/DisposeConfigValue.java
+++ b/src/main/java/com/dispose/common/DisposeConfigValue.java
@@ -7,6 +7,11 @@ package com.dispose.common;
  */
 public class DisposeConfigValue {
 
+    /**
+     * Instantiates a new Dispose config value.
+     */
+    private DisposeConfigValue() {}
+
     /**
      * The constant CHECK_PROTO_REQUEST_TIMEOUT.
      */
@@ -47,5 +52,8 @@ public class DisposeConfigValue {
      */
     public static volatile int MIN_SPLIT_PAGE_SIZE = 10;
 
+    /**
+     * The constant ENABLE_UTEST_MOCK.
+     */
     public static volatile boolean ENABLE_UTEST_MOCK = false;
 }
diff --git a/src/main/java/com/dispose/common/DpTechConfigValue.java b/src/main/java/com/dispose/common/DpTechConfigValue.java
index 898d3aa3..3773f292 100644
--- a/src/main/java/com/dispose/common/DpTechConfigValue.java
+++ b/src/main/java/com/dispose/common/DpTechConfigValue.java
@@ -7,11 +7,16 @@ package com.dispose.common;
  */
 public class DpTechConfigValue {
     /**
-     * The constant SOAP_CONNECT_TIMEOUT.
+     * Instantiates a new Dp tech config value.
+     */
+    private DpTechConfigValue () {}
+
+    /**
+     * The constant SOAP_CONNECT_TIMEOUT_SECOND.
      */
     public static volatile long SOAP_CONNECT_TIMEOUT_SECOND = 60;
     /**
-     * The constant SOAP_RECEIVE_TIMEOUT.
+     * The constant SOAP_RECEIVE_TIMEOUT_SECOND.
      */
     public static volatile long SOAP_RECEIVE_TIMEOUT_SECOND = 60;
 }
diff --git a/src/main/java/com/dispose/common/Helper.java b/src/main/java/com/dispose/common/Helper.java
index 99d28755..cb7a738e 100644
--- a/src/main/java/com/dispose/common/Helper.java
+++ b/src/main/java/com/dispose/common/Helper.java
@@ -23,6 +23,11 @@ import java.util.stream.Collectors;
  */
 public class Helper {
 
+    /**
+     * Instantiates a new Helper.
+     */
+    private Helper () {}
+
     /**
      * Gets current datetime.
      *
diff --git a/src/main/java/com/dispose/common/PrivacyHelper.java b/src/main/java/com/dispose/common/PrivacyHelper.java
index eac15e40..ea339d8c 100644
--- a/src/main/java/com/dispose/common/PrivacyHelper.java
+++ b/src/main/java/com/dispose/common/PrivacyHelper.java
@@ -10,6 +10,12 @@ import inet.ipaddr.IPAddressString;
  * @author <huangxin@cmhi.chinamoblie.com>
  */
 public class PrivacyHelper {
+
+    /**
+     * Instantiates a new Privacy helper.
+     */
+    private PrivacyHelper() {}
+
     /**
      * Ip address privacy string.
      *
diff --git a/src/main/java/com/dispose/common/SecurityConfigValue.java b/src/main/java/com/dispose/common/SecurityConfigValue.java
index 6eb12e03..351ae796 100644
--- a/src/main/java/com/dispose/common/SecurityConfigValue.java
+++ b/src/main/java/com/dispose/common/SecurityConfigValue.java
@@ -6,6 +6,12 @@ package com.dispose.common;
  * @author <huangxin@cmhi.chinamoblie.com>
  */
 public class SecurityConfigValue {
+
+    /**
+     * Instantiates a new Security config value.
+     */
+    private SecurityConfigValue() {}
+
     /**
      * The constant AES_KEY.
      */
diff --git a/src/main/java/com/dispose/restful/RestfulInterface.java b/src/main/java/com/dispose/restful/RestfulInterface.java
index b7cc6f39..e74f6168 100644
--- a/src/main/java/com/dispose/restful/RestfulInterface.java
+++ b/src/main/java/com/dispose/restful/RestfulInterface.java
@@ -22,12 +22,25 @@ import java.util.Map;
  */
 @Slf4j
 public class RestfulInterface {
+    /**
+     * Instantiates a new Restful interface.
+     */
+    private RestfulInterface () {}
+
+    /**
+     * The constant timeOutValue.
+     */
     private static int timeOutValue = 1000;
     /**
      * The constant OBJECT_MAPPER.
      */
     private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
 
+    /**
+     * Init env.
+     *
+     * @param timeout the timeout
+     */
     public static void initEnv(int timeout) {
         RestfulInterface.timeOutValue = timeout;
     }
diff --git a/src/main/java/com/dispose/security/arithmetic/CryptoHelper.java b/src/main/java/com/dispose/security/arithmetic/CryptoHelper.java
index 02c5b55a..645122ba 100644
--- a/src/main/java/com/dispose/security/arithmetic/CryptoHelper.java
+++ b/src/main/java/com/dispose/security/arithmetic/CryptoHelper.java
@@ -23,6 +23,11 @@ import java.security.SecureRandom;
 @Slf4j
 public class CryptoHelper {
 
+    /**
+     * Instantiates a new Crypto helper.
+     */
+    private CryptoHelper() {}
+
     /**
      * The constant AES_ALGORITHM_STR.
      */