diff --git a/core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/pom.xml b/core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/pom.xml
index 757d9229df..09ca44d9be 100644
--- a/core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/pom.xml
+++ b/core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/pom.xml
@@ -3,7 +3,6 @@
          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.baeldung.consumermodule</groupId>
     <artifactId>consumermodule</artifactId>
     <version>1.0</version>
diff --git a/core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml b/core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml
index 4de3df8c01..861f06f089 100644
--- a/core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml
+++ b/core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml
@@ -3,16 +3,16 @@
          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.baeldung.servicemodule</groupId>
+    <artifactId>servicemodule</artifactId>
+    <version>1.0</version>
+
     <parent>
         <artifactId>>com.baeldung.decoupling-pattern2</artifactId>
         <groupId>decoupling-pattern2</groupId>
         <version>1.0-SNAPSHOT</version>
     </parent>
 
-    <groupId>com.baeldung.servicemodule</groupId>
-    <artifactId>servicemodule</artifactId>
-    <version>1.0</version>
-
     <build>
         <plugins>
             <plugin>
diff --git a/core-java-modules/core-java-lang-oop-2/pom.xml b/core-java-modules/core-java-lang-oop-2/pom.xml
index d27df147b7..e90b7ea4b3 100644
--- a/core-java-modules/core-java-lang-oop-2/pom.xml
+++ b/core-java-modules/core-java-lang-oop-2/pom.xml
@@ -29,13 +29,6 @@
             <scope>test</scope>
         </dependency>
 	</dependencies>
-
-    <properties>
-        <h2.version>1.4.199</h2.version>
-        <!-- testing -->
-        <assertj-core.version>3.10.0</assertj-core.version>
-        <equalsverifier.version>3.0.3</equalsverifier.version>
-    </properties>
     
     <build>
         <finalName>core-java-lang-oop-2</finalName>
@@ -47,4 +40,11 @@
         </resources>
     </build>
 
+    <properties>
+        <h2.version>1.4.199</h2.version>
+        <!-- testing -->
+        <assertj-core.version>3.10.0</assertj-core.version>
+        <equalsverifier.version>3.0.3</equalsverifier.version>
+    </properties>
+
 </project>
diff --git a/core-java-modules/core-java-os/pom.xml b/core-java-modules/core-java-os/pom.xml
index f6c5ef04a5..8c5f7fe1e9 100644
--- a/core-java-modules/core-java-os/pom.xml
+++ b/core-java-modules/core-java-os/pom.xml
@@ -54,7 +54,7 @@
         </resources>
 
         <plugins>
-         <plugin>
+            <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin.version}</version>
diff --git a/guava/pom.xml b/guava/pom.xml
index 3a19901a02..17c930cdd2 100644
--- a/guava/pom.xml
+++ b/guava/pom.xml
@@ -26,8 +26,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-
-
     </dependencies>
 
     <build>
diff --git a/java-blockchain/pom.xml b/java-blockchain/pom.xml
index 2f9e011aa7..4c5d0f31d5 100644
--- a/java-blockchain/pom.xml
+++ b/java-blockchain/pom.xml
@@ -7,12 +7,14 @@
     <version>0.1.0-SNAPSHOT</version>
     <name>java-blockchain</name>
     <packaging>jar</packaging>
+
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-java</artifactId>
         <version>0.0.1-SNAPSHOT</version>
         <relativePath>../parent-java</relativePath>
     </parent>
+
     <build>
         <finalName>java-blockchain</finalName>
         <resources>
@@ -33,8 +35,10 @@
             </plugin>
         </plugins>
     </build>
+
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
     </properties>
+
 </project>
\ No newline at end of file