diff --git a/spring-hibernate-dao/pom.xml b/spring-hibernate-dao/pom.xml
index f72835845e..3eee877117 100644
--- a/spring-hibernate-dao/pom.xml
+++ b/spring-hibernate-dao/pom.xml
@@ -1,139 +1,151 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<groupId>org.baeldung</groupId>
-	<artifactId>spring-hibernate-dao</artifactId>
-	<version>0.1-SNAPSHOT</version>
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.baeldung</groupId>
+    <artifactId>spring-hibernate-dao</artifactId>
+    <version>0.1-SNAPSHOT</version>
 
-	<name>spring-hibernate-dao</name>
-	<packaging>war</packaging>
+    <name>spring-hibernate-dao</name>
+    <packaging>war</packaging>
 
-	<dependencies>
+    <dependencies>
 
-		<!-- Spring -->
+        <!-- Spring -->
 
-		<dependency>
-			<groupId>org.springframework</groupId>
-			<artifactId>spring-orm</artifactId>
-			<version>${org.springframework.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework</groupId>
-			<artifactId>spring-context</artifactId>
-			<version>${org.springframework.version}</version>
-		</dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${org.springframework.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-orm</artifactId>
+            <version>${org.springframework.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>${org.springframework.version}</version>
+        </dependency>
 
-		<!-- persistence -->
+        <!-- persistence -->
 
-		<!-- <dependency> -->
-		<!-- <groupId>org.hibernate</groupId> -->
-		<!-- <artifactId>hibernate-entitymanager</artifactId> -->
-		<!-- <version>4.2.1.Final</version> -->
-		<!-- </dependency> -->
-		<dependency>
-			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-core</artifactId>
-			<version>4.2.1.Final</version>
-		</dependency>
+        <!-- <dependency> -->
+        <!-- <groupId>org.hibernate</groupId> -->
+        <!-- <artifactId>hibernate-entitymanager</artifactId> -->
+        <!-- <version>4.2.1.Final</version> -->
+        <!-- </dependency> -->
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>4.2.1.Final</version>
+        </dependency>
 
+        <!-- utils -->
 
-		<!-- test scoped -->
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>14.0.1</version>
+        </dependency>
 
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit-dep</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
+        <!-- test scoped -->
 
-		<dependency>
-			<groupId>org.hamcrest</groupId>
-			<artifactId>hamcrest-core</artifactId>
-			<version>${org.hamcrest.version}</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.hamcrest</groupId>
-			<artifactId>hamcrest-library</artifactId>
-			<version>${org.hamcrest.version}</version>
-			<scope>test</scope>
-		</dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit-dep</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
 
-		<dependency>
-			<groupId>org.mockito</groupId>
-			<artifactId>mockito-core</artifactId>
-			<version>${mockito.version}</version>
-			<scope>test</scope>
-		</dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-core</artifactId>
+            <version>${org.hamcrest.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-library</artifactId>
+            <version>${org.hamcrest.version}</version>
+            <scope>test</scope>
+        </dependency>
 
-	</dependencies>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>${mockito.version}</version>
+            <scope>test</scope>
+        </dependency>
 
-	<build>
-		<finalName>spring-hibernate-dao</finalName>
-		<resources>
-			<resource>
-				<directory>src/main/resources</directory>
-				<filtering>true</filtering>
-			</resource>
-		</resources>
+    </dependencies>
 
-		<plugins>
+    <build>
+        <finalName>spring-hibernate-dao</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
 
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-surefire-plugin</artifactId>
-				<configuration>
-					<excludes>
-						<!-- <exclude>**/*ProductionTest.java</exclude> -->
-					</excludes>
-					<systemPropertyVariables>
-						<!-- <provPersistenceTarget>h2</provPersistenceTarget> -->
-					</systemPropertyVariables>
-				</configuration>
-			</plugin>
+        <plugins>
 
-			<plugin>
-				<groupId>org.codehaus.cargo</groupId>
-				<artifactId>cargo-maven2-plugin</artifactId>
-				<configuration>
-					<wait>true</wait>
-					<container>
-						<containerId>jetty8x</containerId>
-						<type>embedded</type>
-						<systemProperties>
-							<!-- <provPersistenceTarget>cargo</provPersistenceTarget> -->
-						</systemProperties>
-					</container>
-					<configuration>
-						<properties>
-							<cargo.servlet.port>8082</cargo.servlet.port>
-						</properties>
-					</configuration>
-				</configuration>
-			</plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <!-- <exclude>**/*ProductionTest.java</exclude> -->
+                    </excludes>
+                    <systemPropertyVariables>
+                        <!-- <provPersistenceTarget>h2</provPersistenceTarget> -->
+                    </systemPropertyVariables>
+                </configuration>
+            </plugin>
 
-		</plugins>
+            <plugin>
+                <groupId>org.codehaus.cargo</groupId>
+                <artifactId>cargo-maven2-plugin</artifactId>
+                <configuration>
+                    <wait>true</wait>
+                    <container>
+                        <containerId>jetty8x</containerId>
+                        <type>embedded</type>
+                        <systemProperties>
+                            <!-- <provPersistenceTarget>cargo</provPersistenceTarget> -->
+                        </systemProperties>
+                    </container>
+                    <configuration>
+                        <properties>
+                            <cargo.servlet.port>8082</cargo.servlet.port>
+                        </properties>
+                    </configuration>
+                </configuration>
+            </plugin>
 
-	</build>
+        </plugins>
 
-	<properties>
-		<!-- Spring -->
-		<org.springframework.version>3.2.2.RELEASE</org.springframework.version>
+    </build>
 
-		<!-- logging -->
-		<org.slf4j.version>1.7.5</org.slf4j.version>
-		<logback.version>1.0.11</logback.version>
+    <properties>
+        <!-- Spring -->
+        <org.springframework.version>3.2.2.RELEASE</org.springframework.version>
 
-		<!-- testing -->
-		<org.hamcrest.version>1.3</org.hamcrest.version>
-		<junit.version>4.11</junit.version>
-		<mockito.version>1.9.5</mockito.version>
+        <!-- logging -->
+        <org.slf4j.version>1.7.5</org.slf4j.version>
+        <logback.version>1.0.11</logback.version>
 
-		<httpcore.version>4.2.4</httpcore.version>
-		<httpclient.version>4.2.4</httpclient.version>
+        <!-- testing -->
+        <org.hamcrest.version>1.3</org.hamcrest.version>
+        <junit.version>4.11</junit.version>
+        <mockito.version>1.9.5</mockito.version>
 
-		<rest-assured.version>1.8.0</rest-assured.version>
-		<groovy.version>1.8.9</groovy.version>
+        <httpcore.version>4.2.4</httpcore.version>
+        <httpclient.version>4.2.4</httpclient.version>
 
-	</properties>
+        <rest-assured.version>1.8.0</rest-assured.version>
+        <groovy.version>1.8.9</groovy.version>
+
+    </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/config/PersistenceConfig.java b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/config/PersistenceConfig.java
index 33833f364c..fa7138f742 100644
--- a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/config/PersistenceConfig.java
+++ b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/config/PersistenceConfig.java
@@ -15,6 +15,8 @@ import org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBea
 import org.springframework.orm.hibernate4.HibernateTransactionManager;
 import org.springframework.transaction.annotation.EnableTransactionManagement;
 
+import com.google.common.base.Preconditions;
+
 @Configuration
 @EnableTransactionManagement
 @ComponentScan({ "org.baeldung.spring.persistence.dao", "org.baeldung.spring.persistence.service" })
@@ -40,10 +42,10 @@ public class PersistenceConfig {
     @Bean
     public DataSource restDataSource() {
         final DriverManagerDataSource dataSource = new DriverManagerDataSource();
-        dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));
-        dataSource.setUrl(env.getProperty("jdbc.url"));
-        dataSource.setUsername(env.getProperty("jdbc.user"));
-        dataSource.setPassword(env.getProperty("jdbc.pass"));
+        dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
+        dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
+        dataSource.setUsername(Preconditions.checkNotNull(env.getProperty("jdbc.user")));
+        dataSource.setPassword(Preconditions.checkNotNull(env.getProperty("jdbc.pass")));
 
         return dataSource;
     }
diff --git a/spring-hibernate-dao/src/main/webapp/WEB-INF/web.xml b/spring-hibernate-dao/src/main/webapp/WEB-INF/web.xml
index 7e3d3b3181..ebe53ec4c0 100644
--- a/spring-hibernate-dao/src/main/webapp/WEB-INF/web.xml
+++ b/spring-hibernate-dao/src/main/webapp/WEB-INF/web.xml
@@ -22,19 +22,19 @@
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>
 
-    <!-- Spring child -->
-    <servlet>
-        <servlet-name>mvc</servlet-name>
-        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
-        <load-on-startup>1</load-on-startup>
-    </servlet>
-    <servlet-mapping>
-        <servlet-name>mvc</servlet-name>
-        <url-pattern>/</url-pattern>
-    </servlet-mapping>
+    <!-- Spring web -->
+<!--     <servlet> -->
+<!--         <servlet-name>mvc</servlet-name> -->
+<!--         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> -->
+<!--         <load-on-startup>1</load-on-startup> -->
+<!--     </servlet> -->
+<!--     <servlet-mapping> -->
+<!--         <servlet-name>mvc</servlet-name> -->
+<!--         <url-pattern>/</url-pattern> -->
+<!--     </servlet-mapping> -->
 
-    <welcome-file-list>
-        <welcome-file>index.html</welcome-file>
-    </welcome-file-list>
+<!--     <welcome-file-list> -->
+<!--         <welcome-file>index.html</welcome-file> -->
+<!--     </welcome-file-list> -->
 
 </web-app>
\ No newline at end of file