diff --git a/quarkus-extension/pom.xml b/quarkus-extension/pom.xml
index 38d7c3d548..394376e59e 100644
--- a/quarkus-extension/pom.xml
+++ b/quarkus-extension/pom.xml
@@ -9,6 +9,12 @@
     <name>quarkus-extension</name>
     <packaging>pom</packaging>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    
     <modules>
         <module>quarkus-liquibase</module>
         <module>quarkus-app</module>
diff --git a/quarkus-extension/quarkus-app/pom.xml b/quarkus-extension/quarkus-app/pom.xml
index ad57228c44..6d3f4c7c28 100644
--- a/quarkus-extension/quarkus-app/pom.xml
+++ b/quarkus-extension/quarkus-app/pom.xml
@@ -5,7 +5,12 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung.quarkus.app</groupId>
     <artifactId>quarkus-app</artifactId>
-    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>com.baeldung.quarkus.extension</groupId>
+        <artifactId>quarkus-extension</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
 
     <dependencyManagement>
         <dependencies>
@@ -23,12 +28,11 @@
         <dependency>
             <groupId>com.baeldung.quarkus.liquibase</groupId>
             <artifactId>quarkus-liquibase-runtime</artifactId>
-            <version>1.0-SNAPSHOT</version>
+            <version>${project.version}</version>
         </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-jdbc-h2</artifactId>
-            <version>${quarkus.version}</version>
         </dependency>
     </dependencies>
 
@@ -46,31 +50,11 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${compiler-plugin.version}</version>
-            </plugin>
-            <plugin>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${surefire-plugin.version}</version>
-                <configuration>
-                    <systemProperties>
-                        <java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
-                    </systemProperties>
-                </configuration>
-            </plugin>
         </plugins>
     </build>
 
     <properties>
-        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <surefire-plugin.version>2.22.0</surefire-plugin.version>
-        <maven.compiler.parameters>true</maven.compiler.parameters>
         <quarkus.version>1.0.0.Final</quarkus.version>
-        <compiler-plugin.version>3.8.1</compiler-plugin.version>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.target>1.8</maven.compiler.target>
     </properties>
 
 </project>
diff --git a/quarkus-extension/quarkus-liquibase/pom.xml b/quarkus-extension/quarkus-liquibase/pom.xml
index e1f3e243ab..9536561701 100644
--- a/quarkus-extension/quarkus-liquibase/pom.xml
+++ b/quarkus-extension/quarkus-liquibase/pom.xml
@@ -5,19 +5,21 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung.quarkus.liquibase</groupId>
     <artifactId>quarkus-liquibase-parent</artifactId>
-    <version>1.0-SNAPSHOT</version>
     <name>quarkus-liquibase-parent</name>
     <packaging>pom</packaging>
 
+    <parent>
+        <groupId>com.baeldung.quarkus.extension</groupId>
+        <artifactId>quarkus-extension</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    
     <modules>
         <module>runtime</module>
         <module>deployment</module>
     </modules>
 
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <quarkus.version>1.0.0.Final</quarkus.version>
     </properties>
 
diff --git a/quarkus-extension/quarkus-liquibase/runtime/pom.xml b/quarkus-extension/quarkus-liquibase/runtime/pom.xml
index e616060d03..782e4f4e9d 100644
--- a/quarkus-extension/quarkus-liquibase/runtime/pom.xml
+++ b/quarkus-extension/quarkus-liquibase/runtime/pom.xml
@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<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">
+<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>
     <artifactId>quarkus-liquibase-runtime</artifactId>
     <name>quarkus-liquibase-runtime</name>
@@ -26,7 +25,7 @@
         <dependency>
             <groupId>org.liquibase</groupId>
             <artifactId>liquibase-core</artifactId>
-            <version>3.8.1</version>
+            <version>${liquibase-core.version}</version>
         </dependency>
     </dependencies>
 
@@ -65,4 +64,8 @@
         </plugins>
     </build>
 
+    <properties>
+        <liquibase-core.version>3.8.1</liquibase-core.version>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/quarkus/pom.xml b/quarkus/pom.xml
index de4c2ca9a3..09eb90d110 100644
--- a/quarkus/pom.xml
+++ b/quarkus/pom.xml
@@ -118,9 +118,6 @@
     <properties>
         <surefire-plugin.version>2.22.0</surefire-plugin.version>
         <quarkus.version>0.15.0</quarkus.version>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.target>1.8</maven.compiler.target>
     </properties>
 
 </project>
diff --git a/rabbitmq/pom.xml b/rabbitmq/pom.xml
index b544da4c44..33ccf5402f 100644
--- a/rabbitmq/pom.xml
+++ b/rabbitmq/pom.xml
@@ -5,7 +5,6 @@
     <artifactId>rabbitmq</artifactId>
     <version>0.1-SNAPSHOT</version>
     <name>rabbitmq</name>
-    <url>http://maven.apache.org</url>
 
     <parent>
         <groupId>com.baeldung</groupId>
diff --git a/ratpack/pom.xml b/ratpack/pom.xml
index a00be905ee..9ad654fa7d 100644
--- a/ratpack/pom.xml
+++ b/ratpack/pom.xml
@@ -6,7 +6,6 @@
     <version>1.0-SNAPSHOT</version>
     <name>ratpack</name>
     <packaging>jar</packaging>
-    <url>http://maven.apache.org</url>
 
     <parent>
         <groupId>com.baeldung</groupId>
@@ -85,18 +84,7 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <finalName>${project.artifactId}</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-            </resource>
-        </resources>
-    </build>
-
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
         <ratpack.version>1.5.4</ratpack.version>
         <httpclient.version>4.5.3</httpclient.version>
         <httpcore.version>4.4.6</httpcore.version>
diff --git a/restx/pom.xml b/restx/pom.xml
index 17c25fcdc0..ee25c88047 100644
--- a/restx/pom.xml
+++ b/restx/pom.xml
@@ -148,8 +148,6 @@
     </build>
 
     <properties>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <maven.compiler.source>1.8</maven.compiler.source>
         <restx.version>0.35-rc4</restx.version>
         <logback-classic.version>1.2.3</logback-classic.version>
     </properties>
diff --git a/rsocket/pom.xml b/rsocket/pom.xml
index 70f21064b6..5b407c2bd0 100644
--- a/rsocket/pom.xml
+++ b/rsocket/pom.xml
@@ -24,43 +24,10 @@
             <artifactId>rsocket-transport-netty</artifactId>
             <version>${rsocket.version}</version>
         </dependency>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-core</artifactId>
-            <version>${hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-core</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${slf4j-api.version}</version>
-        </dependency>
     </dependencies>
 
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <archetype-packaging.version>3.0.1</archetype-packaging.version>
         <rsocket.version>0.11.13</rsocket.version>
-        <hamcrest.version>1.3</hamcrest.version>
-        <logback.version>1.2.3</logback.version>
-        <slf4j-api.version>1.7.25</slf4j-api.version>
     </properties>
 
 </project>
diff --git a/rule-engines/easy-rules/pom.xml b/rule-engines/easy-rules/pom.xml
index c1ba829045..b9661cd1c3 100644
--- a/rule-engines/easy-rules/pom.xml
+++ b/rule-engines/easy-rules/pom.xml
@@ -9,9 +9,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
+        <artifactId>rule-engines</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../..</relativePath>
     </parent>
 
     <dependencies>
diff --git a/rule-engines/openl-tablets/pom.xml b/rule-engines/openl-tablets/pom.xml
index d1c7baabcc..25c4b8365a 100644
--- a/rule-engines/openl-tablets/pom.xml
+++ b/rule-engines/openl-tablets/pom.xml
@@ -9,9 +9,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
+        <artifactId>rule-engines</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../..</relativePath>
     </parent>
 
     <dependencies>
diff --git a/rule-engines/pom.xml b/rule-engines/pom.xml
index cc015c600b..d3d3127ce0 100644
--- a/rule-engines/pom.xml
+++ b/rule-engines/pom.xml
@@ -10,7 +10,6 @@
         <groupId>com.baeldung</groupId>
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>..</relativePath>
     </parent>
 
     <modules>
diff --git a/rule-engines/rulebook/pom.xml b/rule-engines/rulebook/pom.xml
index b021adea10..95ededa5f9 100644
--- a/rule-engines/rulebook/pom.xml
+++ b/rule-engines/rulebook/pom.xml
@@ -9,9 +9,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
+        <artifactId>rule-engines</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../..</relativePath>
     </parent>
 
     <dependencies>