diff --git a/src/main/java/com/cloudhopper/smpp/SmppConstants.java b/src/main/java/com/cloudhopper/smpp/SmppConstants.java
index 374a9ca5..92704b1c 100644
--- a/src/main/java/com/cloudhopper/smpp/SmppConstants.java
+++ b/src/main/java/com/cloudhopper/smpp/SmppConstants.java
@@ -31,6 +31,8 @@
  */
 public class SmppConstants {
 
+    private SmppConstants() {}
+    
     //
     // SMPP Data Types
     //
diff --git a/src/main/java/com/cloudhopper/smpp/channel/ChannelUtil.java b/src/main/java/com/cloudhopper/smpp/channel/ChannelUtil.java
index 75b84e8d..24a6b406 100644
--- a/src/main/java/com/cloudhopper/smpp/channel/ChannelUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/channel/ChannelUtil.java
@@ -30,6 +30,8 @@
  */
 public class ChannelUtil {
 
+    private ChannelUtil() {}
+    
     /**
      * Create a name for the channel based on the remote host's IP and port.
      */
diff --git a/src/main/java/com/cloudhopper/smpp/channel/SmppChannelConstants.java b/src/main/java/com/cloudhopper/smpp/channel/SmppChannelConstants.java
index 0ccddba7..4ec2bc7d 100644
--- a/src/main/java/com/cloudhopper/smpp/channel/SmppChannelConstants.java
+++ b/src/main/java/com/cloudhopper/smpp/channel/SmppChannelConstants.java
@@ -27,6 +27,8 @@
  */
 public class SmppChannelConstants {
 
+    private SmppChannelConstants() {}
+    
     public static final String PIPELINE_SERVER_CONNECTOR_NAME = "smppServerConnector";
 
     // default channel handler used only during connects
diff --git a/src/main/java/com/cloudhopper/smpp/util/ChannelBufferUtil.java b/src/main/java/com/cloudhopper/smpp/util/ChannelBufferUtil.java
index 833026d0..320c0769 100644
--- a/src/main/java/com/cloudhopper/smpp/util/ChannelBufferUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/util/ChannelBufferUtil.java
@@ -37,6 +37,9 @@
  * @author joelauer (twitter: @jjlauer or <a href="http://twitter.com/jjlauer" target=window>http://twitter.com/jjlauer</a>)
  */
 public class ChannelBufferUtil {
+    
+    private ChannelBufferUtil() {}
+    
     private static final Logger logger = LoggerFactory.getLogger(ChannelBufferUtil.class);
 
     /**
diff --git a/src/main/java/com/cloudhopper/smpp/util/DaemonExecutors.java b/src/main/java/com/cloudhopper/smpp/util/DaemonExecutors.java
index f65e373b..2c671bdf 100644
--- a/src/main/java/com/cloudhopper/smpp/util/DaemonExecutors.java
+++ b/src/main/java/com/cloudhopper/smpp/util/DaemonExecutors.java
@@ -30,6 +30,8 @@
  */
 public class DaemonExecutors {
 
+    private DaemonExecutors() {}
+    
     /**
      * Utility method for creating a cached pool of "daemon" threads.  A daemon
      * thread does not limit the JVM from exiting if they aren't shutdown.
diff --git a/src/main/java/com/cloudhopper/smpp/util/PduUtil.java b/src/main/java/com/cloudhopper/smpp/util/PduUtil.java
index 80cb3391..ecebe583 100644
--- a/src/main/java/com/cloudhopper/smpp/util/PduUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/util/PduUtil.java
@@ -29,6 +29,8 @@
  */
 public class PduUtil {
 
+    private PduUtil() {}
+    
     /**
      * Calculates size of a "C-String" by returning the length of the String
      * plus 1 (for the NULL byte).  If the parameter is null, will return 1.
diff --git a/src/main/java/com/cloudhopper/smpp/util/SmppSessionUtil.java b/src/main/java/com/cloudhopper/smpp/util/SmppSessionUtil.java
index 62b235c2..9d23ee35 100644
--- a/src/main/java/com/cloudhopper/smpp/util/SmppSessionUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/util/SmppSessionUtil.java
@@ -34,6 +34,9 @@
  * @author joelauer (twitter: @jjlauer or <a href="http://twitter.com/jjlauer" target=window>http://twitter.com/jjlauer</a>)
  */
 public class SmppSessionUtil {
+    
+    private SmppSessionUtil() {}
+    
     private static final Logger logger = LoggerFactory.getLogger(SmppSessionUtil.class);
 
     static public void close(SmppSession session) {
diff --git a/src/main/java/com/cloudhopper/smpp/util/SmppUtil.java b/src/main/java/com/cloudhopper/smpp/util/SmppUtil.java
index 6084b1e3..b33eca40 100644
--- a/src/main/java/com/cloudhopper/smpp/util/SmppUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/util/SmppUtil.java
@@ -31,6 +31,8 @@
  */
 public class SmppUtil {
 
+    private SmppUtil() {}
+    
     /**
      * Does the "esm_class" value have a message type set at all?  This basically
      * checks if the "esm_class" could either be SMSC delivery receipt, ESME delivery receipt,
diff --git a/src/main/java/com/cloudhopper/smpp/util/TlvUtil.java b/src/main/java/com/cloudhopper/smpp/util/TlvUtil.java
index 6a31db21..7425ca81 100644
--- a/src/main/java/com/cloudhopper/smpp/util/TlvUtil.java
+++ b/src/main/java/com/cloudhopper/smpp/util/TlvUtil.java
@@ -30,6 +30,8 @@
  * @author joelauer (twitter: @jjlauer or <a href="http://twitter.com/jjlauer" target=window>http://twitter.com/jjlauer</a>)
  */
 public class TlvUtil {
+    
+    private TlvUtil() {}
 
     /**
      * Writes a variable length C-String (null terminated) TLV.  If the String