diff --git a/dependency-injection/pom.xml b/dependency-injection/pom.xml
index 3472da240..88ccdd2d4 100644
--- a/dependency-injection/pom.xml
+++ b/dependency-injection/pom.xml
@@ -43,10 +43,9 @@
       <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
-	<dependency>
-	  <groupId>com.google.inject</groupId>
-	  <artifactId>guice</artifactId>
-	  <version>4.0</version>
-	</dependency>    
+    <dependency>
+      <groupId>com.google.inject</groupId>
+      <artifactId>guice</artifactId>
+    </dependency>
   </dependencies>
 </project>
diff --git a/pom.xml b/pom.xml
index 302346993..023579e97 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,413 +17,418 @@
     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     THE SOFTWARE.
---><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>com.iluwatar</groupId>
-	<artifactId>java-design-patterns</artifactId>
-	<version>1.13.0-SNAPSHOT</version>
-	<packaging>pom</packaging>
-
-	<inceptionYear>2014</inceptionYear>
-
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<hibernate.version>5.0.1.Final</hibernate.version>
-		<spring.version>4.2.4.RELEASE</spring.version>
-    <spring-boot.version>1.3.3.RELEASE</spring-boot.version>
-		<spring-data.version>1.9.2.RELEASE</spring-data.version>
-		<h2.version>1.4.190</h2.version>
-		<junit.version>4.12</junit.version>
-		<compiler.version>3.0</compiler.version>
-		<coveralls.version>4.0.0</coveralls.version>
-		<jacoco.version>0.7.2.201409121644</jacoco.version>
-		<commons-dbcp.version>1.4</commons-dbcp.version>
-		<camel.version>2.16.1</camel.version>
-		<log4j.version>1.2.17</log4j.version>
- 		<guava.version>19.0</guava.version>
-		<systemrules.version>1.15.1</systemrules.version>
-		<mockito.version>1.10.19</mockito.version>
-		<hierarchical-junit-runner-version>4.12.1</hierarchical-junit-runner-version>
+-->
+<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>com.iluwatar</groupId>
+    <artifactId>java-design-patterns</artifactId>
+    <version>1.13.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+    <inceptionYear>2014</inceptionYear>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <hibernate.version>5.0.1.Final</hibernate.version>
+        <spring.version>4.2.4.RELEASE</spring.version>
+        <spring-boot.version>1.3.3.RELEASE</spring-boot.version>
+        <spring-data.version>1.9.2.RELEASE</spring-data.version>
+        <h2.version>1.4.190</h2.version>
+        <junit.version>4.12</junit.version>
+        <compiler.version>3.0</compiler.version>
+        <coveralls.version>4.0.0</coveralls.version>
+        <jacoco.version>0.7.2.201409121644</jacoco.version>
+        <commons-dbcp.version>1.4</commons-dbcp.version>
+        <camel.version>2.16.1</camel.version>
+        <log4j.version>1.2.17</log4j.version>
+        <guava.version>19.0</guava.version>
+        <systemrules.version>1.15.1</systemrules.version>
+        <mockito.version>1.10.19</mockito.version>
+        <hierarchical-junit-runner-version>4.12.1</hierarchical-junit-runner-version>
         <apache-httpcomponents.version>4.5.2</apache-httpcomponents.version>
         <htmlunit.version>2.22</htmlunit.version>
         <urm.version>1.4.1</urm.version>
-	</properties>
-	<modules>
-		<module>abstract-factory</module>
-		<module>builder</module>
-		<module>factory-method</module>
-		<module>prototype</module>
-		<module>singleton</module>
-		<module>adapter</module>
-		<module>bridge</module>
-		<module>composite</module>
-		<module>dao</module>
-		<module>data-mapper</module>
-		<module>decorator</module>
-		<module>facade</module>
-		<module>flyweight</module>
-		<module>proxy</module>
-		<module>chain</module>
-		<module>command</module>
-		<module>interpreter</module>
-		<module>iterator</module>
-		<module>mediator</module>
-		<module>memento</module>
-		<module>model-view-presenter</module>
-		<module>observer</module>
-		<module>state</module>
-		<module>strategy</module>
-		<module>template-method</module>
-		<module>visitor</module>
-		<module>double-checked-locking</module>
-		<module>servant</module>
-		<module>service-locator</module>
-		<module>null-object</module>
-		<module>event-aggregator</module>
-		<module>callback</module>
-		<module>execute-around</module>
-		<module>property</module>
-		<module>intercepting-filter</module>
-		<module>producer-consumer</module>
-		<module>poison-pill</module>
-		<module>reader-writer-lock</module>
-		<module>lazy-loading</module>
-		<module>service-layer</module>
-		<module>specification</module>
-		<module>tolerant-reader</module>
-		<module>model-view-controller</module>
-		<module>flux</module>
-		<module>double-dispatch</module>
-		<module>multiton</module>
-		<module>resource-acquisition-is-initialization</module>
-		<module>thread-pool</module>
-		<module>twin</module>
-		<module>private-class-data</module>
-		<module>object-pool</module>
-		<module>dependency-injection</module>
-		<module>naked-objects</module>
-		<module>front-controller</module>
-		<module>repository</module>
-		<module>async-method-invocation</module>
-		<module>monostate</module>
-		<module>step-builder</module>
-		<module>business-delegate</module>
-		<module>half-sync-half-async</module>
-		<module>layers</module>
-		<module>message-channel</module>
-		<module>fluentinterface</module>
-		<module>reactor</module>
-		<module>caching</module>
-		<module>publish-subscribe</module>
-		<module>delegation</module>
-		<module>event-driven-architecture</module>
-		<module>api-gateway</module>
-		<module>factory-kit</module>
-		<module>feature-toggle</module>
-		<module>value-object</module>
-		<module>monad</module>
-		<module>mute-idiom</module>
-		<module>mutex</module>
-		<module>semaphore</module>
-		<module>hexagonal</module>
-		<module>abstract-document</module>
-		<module>aggregator-microservices</module>
-		<module>promise</module>
+        <guice.version>4.0</guice.version>
+    </properties>
+    <modules>
+        <module>abstract-factory</module>
+        <module>builder</module>
+        <module>factory-method</module>
+        <module>prototype</module>
+        <module>singleton</module>
+        <module>adapter</module>
+        <module>bridge</module>
+        <module>composite</module>
+        <module>dao</module>
+        <module>data-mapper</module>
+        <module>decorator</module>
+        <module>facade</module>
+        <module>flyweight</module>
+        <module>proxy</module>
+        <module>chain</module>
+        <module>command</module>
+        <module>interpreter</module>
+        <module>iterator</module>
+        <module>mediator</module>
+        <module>memento</module>
+        <module>model-view-presenter</module>
+        <module>observer</module>
+        <module>state</module>
+        <module>strategy</module>
+        <module>template-method</module>
+        <module>visitor</module>
+        <module>double-checked-locking</module>
+        <module>servant</module>
+        <module>service-locator</module>
+        <module>null-object</module>
+        <module>event-aggregator</module>
+        <module>callback</module>
+        <module>execute-around</module>
+        <module>property</module>
+        <module>intercepting-filter</module>
+        <module>producer-consumer</module>
+        <module>poison-pill</module>
+        <module>reader-writer-lock</module>
+        <module>lazy-loading</module>
+        <module>service-layer</module>
+        <module>specification</module>
+        <module>tolerant-reader</module>
+        <module>model-view-controller</module>
+        <module>flux</module>
+        <module>double-dispatch</module>
+        <module>multiton</module>
+        <module>resource-acquisition-is-initialization</module>
+        <module>thread-pool</module>
+        <module>twin</module>
+        <module>private-class-data</module>
+        <module>object-pool</module>
+        <module>dependency-injection</module>
+        <module>naked-objects</module>
+        <module>front-controller</module>
+        <module>repository</module>
+        <module>async-method-invocation</module>
+        <module>monostate</module>
+        <module>step-builder</module>
+        <module>business-delegate</module>
+        <module>half-sync-half-async</module>
+        <module>layers</module>
+        <module>message-channel</module>
+        <module>fluentinterface</module>
+        <module>reactor</module>
+        <module>caching</module>
+        <module>publish-subscribe</module>
+        <module>delegation</module>
+        <module>event-driven-architecture</module>
+        <module>api-gateway</module>
+        <module>factory-kit</module>
+        <module>feature-toggle</module>
+        <module>value-object</module>
+        <module>monad</module>
+        <module>mute-idiom</module>
+        <module>mutex</module>
+        <module>semaphore</module>
+        <module>hexagonal</module>
+        <module>abstract-document</module>
+        <module>aggregator-microservices</module>
+        <module>promise</module>
         <module>page-object</module>
-	</modules>
+    </modules>
 
-	<dependencyManagement>
-		<dependencies>
-			<dependency>
-				<groupId>org.hibernate</groupId>
-				<artifactId>hibernate-core</artifactId>
-				<version>${hibernate.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>org.hibernate</groupId>
-				<artifactId>hibernate-entitymanager</artifactId>
-				<version>${hibernate.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>org.springframework</groupId>
-				<artifactId>spring-test</artifactId>
-				<version>${spring.version}</version>
-			</dependency>
-      <dependency>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-dependencies</artifactId>
-        <version>${spring-boot.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-            		<dependency>
-				<groupId>org.springframework.data</groupId>
-				<artifactId>spring-data-jpa</artifactId>
-				<version>${spring-data.version}</version>
-			</dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-webmvc</artifactId>
-        <version>${spring.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-starter-web</artifactId>
-        <version>${spring-boot.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.apache.httpcomponents</groupId>
-        <artifactId>httpclient</artifactId>
-        <version>${apache-httpcomponents.version}</version>
-      </dependency>
-			<dependency>
-				<groupId>com.h2database</groupId>
-				<artifactId>h2</artifactId>
-				<version>${h2.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>commons-dbcp</groupId>
-				<artifactId>commons-dbcp</artifactId>
-				<version>${commons-dbcp.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>org.apache.camel</groupId>
-				<artifactId>camel-core</artifactId>
-				<version>${camel.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>org.apache.camel</groupId>
-				<artifactId>camel-stream</artifactId>
-				<version>${camel.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>junit</groupId>
-				<artifactId>junit</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>log4j</groupId>
-				<artifactId>log4j</artifactId>
-				<version>${log4j.version}</version>
-			</dependency>
-			<dependency>
-				<groupId>com.google.guava</groupId>
-				<artifactId>guava</artifactId>
-				<version>${guava.version}</version>
-            		</dependency>
-			<dependency>
-				<groupId>com.github.stefanbirkner</groupId>
-				<artifactId>system-rules</artifactId>
-				<version>${systemrules.version}</version>
-				<scope>test</scope>
-			</dependency>
-			<dependency>
-				<groupId>de.bechte.junit</groupId>
-  				<artifactId>junit-hierarchicalcontextrunner</artifactId>
-  				<version>${hierarchical-junit-runner-version}</version>
-  				<scope>test</scope>
-			</dependency>
-			<dependency>
-				<groupId>net.sourceforge.htmlunit</groupId>
-				<artifactId>htmlunit</artifactId>
-				<version>${htmlunit.version}</version>
-				<scope>test</scope>
-			</dependency>
-		</dependencies>
-	</dependencyManagement>
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.hibernate</groupId>
+                <artifactId>hibernate-core</artifactId>
+                <version>${hibernate.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.hibernate</groupId>
+                <artifactId>hibernate-entitymanager</artifactId>
+                <version>${hibernate.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework</groupId>
+                <artifactId>spring-test</artifactId>
+                <version>${spring.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.data</groupId>
+                <artifactId>spring-data-jpa</artifactId>
+                <version>${spring-data.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework</groupId>
+                <artifactId>spring-webmvc</artifactId>
+                <version>${spring.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-web</artifactId>
+                <version>${spring-boot.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.httpcomponents</groupId>
+                <artifactId>httpclient</artifactId>
+                <version>${apache-httpcomponents.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.h2database</groupId>
+                <artifactId>h2</artifactId>
+                <version>${h2.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>commons-dbcp</groupId>
+                <artifactId>commons-dbcp</artifactId>
+                <version>${commons-dbcp.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.camel</groupId>
+                <artifactId>camel-core</artifactId>
+                <version>${camel.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.camel</groupId>
+                <artifactId>camel-stream</artifactId>
+                <version>${camel.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>junit</groupId>
+                <artifactId>junit</artifactId>
+                <version>${junit.version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-core</artifactId>
+                <version>${mockito.version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>log4j</groupId>
+                <artifactId>log4j</artifactId>
+                <version>${log4j.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.guava</groupId>
+                <artifactId>guava</artifactId>
+                <version>${guava.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.github.stefanbirkner</groupId>
+                <artifactId>system-rules</artifactId>
+                <version>${systemrules.version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>de.bechte.junit</groupId>
+                <artifactId>junit-hierarchicalcontextrunner</artifactId>
+                <version>${hierarchical-junit-runner-version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>net.sourceforge.htmlunit</groupId>
+                <artifactId>htmlunit</artifactId>
+                <version>${htmlunit.version}</version>
+                <scope>test</scope>
+            </dependency>
+            <dependency>
+                <groupId>com.google.inject</groupId>
+                <artifactId>guice</artifactId>
+                <version>${guice.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
 
 
-	<build>
-		<pluginManagement>
-			<plugins>
-				<!-- This plugin's configuration is used to store Eclipse m2e settings
-					only. It has no influence on the Maven build itself. TODO: Remove when the
-					m2e plugin can correctly bind to Maven lifecycle -->
-				<plugin>
-					<groupId>org.eclipse.m2e</groupId>
-					<artifactId>lifecycle-mapping</artifactId>
-					<version>1.0.0</version>
-					<configuration>
-						<lifecycleMappingMetadata>
-							<pluginExecutions>
-								<pluginExecution>
-									<pluginExecutionFilter>
-										<groupId>org.jacoco</groupId>
-										<artifactId>
-											jacoco-maven-plugin
-										</artifactId>
-										<versionRange>
-											[0.6.2,)
-										</versionRange>
-										<goals>
-											<goal>prepare-agent</goal>
-										</goals>
-									</pluginExecutionFilter>
-									<action>
-										<ignore/>
-									</action>
-								</pluginExecution>
-							</pluginExecutions>
-						</lifecycleMappingMetadata>
-					</configuration>
-				</plugin>
-			</plugins>
-		</pluginManagement>
+    <build>
+        <pluginManagement>
+            <plugins>
+                <!-- This plugin's configuration is used to store Eclipse m2e settings
+                    only. It has no influence on the Maven build itself. TODO: Remove when the
+                    m2e plugin can correctly bind to Maven lifecycle -->
+                <plugin>
+                    <groupId>org.eclipse.m2e</groupId>
+                    <artifactId>lifecycle-mapping</artifactId>
+                    <version>1.0.0</version>
+                    <configuration>
+                        <lifecycleMappingMetadata>
+                            <pluginExecutions>
+                                <pluginExecution>
+                                    <pluginExecutionFilter>
+                                        <groupId>org.jacoco</groupId>
+                                        <artifactId>
+                                            jacoco-maven-plugin
+                                        </artifactId>
+                                        <versionRange>
+                                            [0.6.2,)
+                                        </versionRange>
+                                        <goals>
+                                            <goal>prepare-agent</goal>
+                                        </goals>
+                                    </pluginExecutionFilter>
+                                    <action>
+                                        <ignore/>
+                                    </action>
+                                </pluginExecution>
+                            </pluginExecutions>
+                        </lifecycleMappingMetadata>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
 
-		<plugins>
-			<!-- Tell maven to compile using Java 8 -->
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>${compiler.version}</version>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-				</configuration>
-			</plugin>
-			<plugin>
-				<groupId>org.eluder.coveralls</groupId>
-				<artifactId>coveralls-maven-plugin</artifactId>
-				<version>${coveralls.version}</version>
-				<configuration>
-					<repoToken>jb6wYzxkVvjolD6qOWpzWdcWBzYk2fAmF</repoToken>
-				</configuration>
-			</plugin>
-			<plugin>
-				<groupId>org.jacoco</groupId>
-				<artifactId>jacoco-maven-plugin</artifactId>
-				<version>${jacoco.version}</version>
-				<!-- The following exclude configuration was added because error occurred
-					when executing "mvn clean test jacoco:report coveralls:report" -->
-				<!-- [ERROR] Failed to execute goal org.eluder.coveralls:coveralls-maven-plugin:3.1.0:report
-					(default-cli) on project java-design-patterns: I/O operation failed: No source
-					found for domainapp/dom/modules/simple/QSimpleObject.java -> [Help 1] -->
-				<configuration>
-					<excludes>
-						<exclude>domainapp/dom/modules/simple/QSimpleObject.class</exclude>
-						<exclude>**com.steadystate*</exclude>
-					</excludes>
-				</configuration>
-				<executions>
-					<execution>
-						<id>prepare-agent</id>
-						<goals>
-							<goal>prepare-agent</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-
-			<!--checkstyle plug-in. checking against googles styles
-			   see config at checkstyle.xml
-			-->
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-checkstyle-plugin</artifactId>
-				<version>2.17</version>
-				<executions>
-					<execution>
-						<id>validate</id>
-						<goals>
-							<goal>check</goal>
-						</goals>
-						<phase>validate</phase>
-						<configuration>
-							<configLocation>checkstyle.xml</configLocation>
-							<suppressionsLocation>checkstyle-suppressions.xml</suppressionsLocation>
-							<encoding>UTF-8</encoding>
-							<consoleOutput>true</consoleOutput>
-							<failsOnError>true</failsOnError>
-							<includeTestSourceDirectory>true</includeTestSourceDirectory>
-						</configuration>
-					</execution>
-				</executions>
-			</plugin>
-
-			<plugin>
-				<groupId>org.jacoco</groupId>
-				<artifactId>jacoco-maven-plugin</artifactId>
-				<version>0.7.5.201505241946</version>
-				<executions>
-					<execution>
-						<goals>
-							<goal>prepare-agent</goal>
-						</goals>
-					</execution>
-					<execution>
-						<id>report</id>
-						<phase>prepare-package</phase>
-						<goals>
-							<goal>report</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-surefire-plugin</artifactId>
-				<version>2.18.1</version>
-				<dependencies>
-					<dependency>
-						<groupId>org.apache.maven.surefire</groupId>
-						<artifactId>surefire-junit47</artifactId>
-						<version>2.18.1</version>
-					</dependency>
-				</dependencies>
-				<configuration>
-					<argLine>-Xmx1024M ${argLine}</argLine>
-				</configuration>
-			</plugin>
+        <plugins>
+            <!-- Tell maven to compile using Java 8 -->
             <plugin>
-              <groupId>org.apache.maven.plugins</groupId>
-              <artifactId>maven-pmd-plugin</artifactId>
-              <version>3.6</version>
-              <configuration>
-                <failOnViolation>true</failOnViolation>
-                <failurePriority>5</failurePriority>
-                <printFailingErrors>true</printFailingErrors>
-              </configuration>
-              <executions>
-                <execution>
-                  <goals>
-                    <goal>check</goal>
-                  </goals>
-                  <configuration>
-					  <excludeFromFailureFile>exclude-pmd.properties</excludeFromFailureFile>
-				  </configuration>
-                </execution>
-              </executions>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${compiler.version}</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.eluder.coveralls</groupId>
+                <artifactId>coveralls-maven-plugin</artifactId>
+                <version>${coveralls.version}</version>
+                <configuration>
+                    <repoToken>jb6wYzxkVvjolD6qOWpzWdcWBzYk2fAmF</repoToken>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>${jacoco.version}</version>
+                <!-- The following exclude configuration was added because error occurred
+                    when executing "mvn clean test jacoco:report coveralls:report" -->
+                <!-- [ERROR] Failed to execute goal org.eluder.coveralls:coveralls-maven-plugin:3.1.0:report
+                    (default-cli) on project java-design-patterns: I/O operation failed: No source
+                    found for domainapp/dom/modules/simple/QSimpleObject.java -> [Help 1] -->
+                <configuration>
+                    <excludes>
+                        <exclude>domainapp/dom/modules/simple/QSimpleObject.class</exclude>
+                        <exclude>**com.steadystate*</exclude>
+                    </excludes>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>prepare-agent</id>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
 
-			<plugin>
-				<groupId>com.mycila</groupId>
-				<artifactId>license-maven-plugin</artifactId>
-				<version>2.11</version>
-				<configuration>
-					<header>com/mycila/maven/plugin/license/templates/MIT.txt</header>
-					<properties>
-						<owner>Ilkka Seppälä</owner>
-					</properties>
-					<skipExistingHeaders>true</skipExistingHeaders>
-				</configuration>
-				<executions>
-					<execution>
-						<id>install-format</id>
-						<phase>install</phase>
-						<goals>
-							<goal>format</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
+            <!--checkstyle plug-in. checking against googles styles
+               see config at checkstyle.xml
+            -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>2.17</version>
+                <executions>
+                    <execution>
+                        <id>validate</id>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                        <phase>validate</phase>
+                        <configuration>
+                            <configLocation>checkstyle.xml</configLocation>
+                            <suppressionsLocation>checkstyle-suppressions.xml</suppressionsLocation>
+                            <encoding>UTF-8</encoding>
+                            <consoleOutput>true</consoleOutput>
+                            <failsOnError>true</failsOnError>
+                            <includeTestSourceDirectory>true</includeTestSourceDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.7.5.201505241946</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>report</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>report</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.18.1</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.apache.maven.surefire</groupId>
+                        <artifactId>surefire-junit47</artifactId>
+                        <version>2.18.1</version>
+                    </dependency>
+                </dependencies>
+                <configuration>
+                    <argLine>-Xmx1024M ${argLine}</argLine>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-pmd-plugin</artifactId>
+                <version>3.6</version>
+                <configuration>
+                    <failOnViolation>true</failOnViolation>
+                    <failurePriority>5</failurePriority>
+                    <printFailingErrors>true</printFailingErrors>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                        <configuration>
+                            <excludeFromFailureFile>exclude-pmd.properties</excludeFromFailureFile>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+
+            <plugin>
+                <groupId>com.mycila</groupId>
+                <artifactId>license-maven-plugin</artifactId>
+                <version>2.11</version>
+                <configuration>
+                    <header>com/mycila/maven/plugin/license/templates/MIT.txt</header>
+                    <properties>
+                        <owner>Ilkka Seppälä</owner>
+                    </properties>
+                    <skipExistingHeaders>true</skipExistingHeaders>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>install-format</id>
+                        <phase>install</phase>
+                        <goals>
+                            <goal>format</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
 
             <plugin>
                 <groupId>com.github.markusmo3.urm</groupId>
@@ -448,17 +453,17 @@
                     </skipForProjects>
                 </configuration>
             </plugin>
-		</plugins>
-	</build>
+        </plugins>
+    </build>
 
-  <reporting>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-pmd-plugin</artifactId>
-        <version>3.6</version>
-      </plugin>
-    </plugins>
-  </reporting>
+    <reporting>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-pmd-plugin</artifactId>
+                <version>3.6</version>
+            </plugin>
+        </plugins>
+    </reporting>
 
 </project>