diff --git a/animal-sniffer-mvn-plugin/pom.xml b/animal-sniffer-mvn-plugin/pom.xml
index 55e37e2ec4..fd8f6d3d8c 100644
--- a/animal-sniffer-mvn-plugin/pom.xml
+++ b/animal-sniffer-mvn-plugin/pom.xml
@@ -1,7 +1,6 @@
 <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/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>animal-sniffer-mvn-plugin</artifactId>
     <version>1.0-SNAPSHOT</version>
     <name>animal-sniffer-mvn-plugin</name>
diff --git a/apache-avro/pom.xml b/apache-avro/pom.xml
index e6fb4d24ff..6baae9c541 100644
--- a/apache-avro/pom.xml
+++ b/apache-avro/pom.xml
@@ -14,12 +14,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
@@ -46,15 +40,6 @@
 
     <build>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${compiler-plugin.version}</version>
-                <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.avro</groupId>
                 <artifactId>avro-maven-plugin</artifactId>
@@ -79,8 +64,6 @@
     </build>
 
     <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <compiler-plugin.version>3.5</compiler-plugin.version>
         <avro.version>1.8.2</avro.version>
         <slf4j.version>1.7.25</slf4j.version>
     </properties>
diff --git a/apache-fop/pom.xml b/apache-fop/pom.xml
index 879eb4f111..150756d51d 100644
--- a/apache-fop/pom.xml
+++ b/apache-fop/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>apache-fop</artifactId>
     <version>0.1-SNAPSHOT</version>
     <name>apache-fop</name>
diff --git a/apache-geode/pom.xml b/apache-geode/pom.xml
index 15c7e04d29..57195a5991 100644
--- a/apache-geode/pom.xml
+++ b/apache-geode/pom.xml
@@ -17,27 +17,8 @@
         <dependency>
             <groupId>org.apache.geode</groupId>
             <artifactId>geode-core</artifactId>
-            <version>${geode.core}</version>
-        </dependency>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
         </dependency>
     </dependencies>
-    
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
 	
     <properties>
         <geode.core>1.6.0</geode.core>
diff --git a/apache-meecrowave/pom.xml b/apache-meecrowave/pom.xml
index 4eb1094f94..51c6514992 100644
--- a/apache-meecrowave/pom.xml
+++ b/apache-meecrowave/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>apache-meecrowave</artifactId>
     <version>0.0.1</version>
     <name>apache-meecrowave</name>
@@ -38,13 +37,6 @@
             <version>${meecrowave-junit.version}</version>
             <scope>test</scope>
         </dependency>
-        <!-- https://mvnrepository.com/artifact/junit/junit -->
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 	
     <build>
diff --git a/apache-olingo/olingo2/pom.xml b/apache-olingo/olingo2/pom.xml
index 727e6ca484..95b123efbc 100644
--- a/apache-olingo/olingo2/pom.xml
+++ b/apache-olingo/olingo2/pom.xml
@@ -5,7 +5,6 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.baeldung.examples.olingo2</groupId>
 	<artifactId>olingo2</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
 	<name>olingo2</name>
 	<description>Sample Olingo 2 Project</description>
 
diff --git a/apache-pulsar/pom.xml b/apache-pulsar/pom.xml
index 8a0882dae1..fdd9ae1e95 100644
--- a/apache-pulsar/pom.xml
+++ b/apache-pulsar/pom.xml
@@ -24,8 +24,6 @@
     </dependencies>
 	
     <properties>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <maven.compiler.source>1.8</maven.compiler.source>
-		<pulsar-client.version>2.1.1-incubating</pulsar-client.version>
+ 		<pulsar-client.version>2.1.1-incubating</pulsar-client.version>
     </properties>
 </project>
diff --git a/apache-solrj/pom.xml b/apache-solrj/pom.xml
index 1227fdca46..b19ceb1e48 100644
--- a/apache-solrj/pom.xml
+++ b/apache-solrj/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>apache-solrj</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>apache-solrj</name>
diff --git a/apache-spark/pom.xml b/apache-spark/pom.xml
index 3df81e5aee..41fd51d9fd 100644
--- a/apache-spark/pom.xml
+++ b/apache-spark/pom.xml
@@ -2,7 +2,6 @@
 	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</groupId>
 	<artifactId>apache-spark</artifactId>
 	<version>1.0-SNAPSHOT</version>
 	<name>apache-spark</name>
@@ -59,15 +58,6 @@
 
 	<build>
 		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>${maven-compiler-plugin.version}</version>
-				<configuration>
-					<source>${java.version}</source>
-					<target>${java.version}</target>
-				</configuration>
-			</plugin>
 			<plugin>
 				<artifactId>maven-assembly-plugin</artifactId>
 				<executions>
@@ -95,7 +85,6 @@
 		<org.apache.spark.spark-streaming-kafka.version>2.3.0</org.apache.spark.spark-streaming-kafka.version>
 		<com.datastax.spark.spark-cassandra-connector.version>2.3.0</com.datastax.spark.spark-cassandra-connector.version>
 		<com.datastax.spark.spark-cassandra-connector-java.version>1.5.2</com.datastax.spark.spark-cassandra-connector-java.version>
-		<maven-compiler-plugin.version>3.2</maven-compiler-plugin.version>
 	</properties>
 
 </project>
diff --git a/apache-velocity/pom.xml b/apache-velocity/pom.xml
index 24ab0b861d..b370b11cc1 100644
--- a/apache-velocity/pom.xml
+++ b/apache-velocity/pom.xml
@@ -1,7 +1,6 @@
 <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/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <version>0.1-SNAPSHOT</version>
     <artifactId>apache-velocity</artifactId>
     <name>apache-velocity</name>
diff --git a/aws-lambda/pom.xml b/aws-lambda/pom.xml
index c799718e61..1f3c31f87c 100644
--- a/aws-lambda/pom.xml
+++ b/aws-lambda/pom.xml
@@ -2,7 +2,6 @@
 <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.baeldung</groupId>
     <artifactId>aws-lambda</artifactId>
     <version>0.1.0-SNAPSHOT</version>
     <name>aws-lambda</name>
@@ -88,7 +87,6 @@
     
     <properties>
         <json-simple.version>1.1.1</json-simple.version>
-        <org.json.version>20180130</org.json.version>
         <commons-io.version>2.5</commons-io.version>
         <aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
         <aws-lambda-java-core.version>1.2.0</aws-lambda-java-core.version>
diff --git a/aws/pom.xml b/aws/pom.xml
index 75d5aac1eb..45a30f96ba 100644
--- a/aws/pom.xml
+++ b/aws/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>aws</artifactId>
     <version>0.1.0-SNAPSHOT</version>
     <name>aws</name>
diff --git a/axon/pom.xml b/axon/pom.xml
index 3d30cceb83..21e21f0ef2 100644
--- a/axon/pom.xml
+++ b/axon/pom.xml
@@ -30,7 +30,6 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-autoconfigure</artifactId>
-            <version>${spring-boot.version}</version>
             <scope>compile</scope>
         </dependency>
 
diff --git a/azure/pom.xml b/azure/pom.xml
index 270b3e4829..3d9c296748 100644
--- a/azure/pom.xml
+++ b/azure/pom.xml
@@ -2,7 +2,6 @@
 <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.baeldung</groupId>
     <artifactId>azure</artifactId>
     <version>0.1</version>
     <name>azure</name>
diff --git a/parent-java/pom.xml b/parent-java/pom.xml
index 09e2596d0a..fd3028680d 100644
--- a/parent-java/pom.xml
+++ b/parent-java/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>parent-java</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>parent-java</name>
diff --git a/parent-kotlin/pom.xml b/parent-kotlin/pom.xml
index d993fad3c6..bda5fb70e7 100644
--- a/parent-kotlin/pom.xml
+++ b/parent-kotlin/pom.xml
@@ -56,18 +56,15 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>
-			<version>${kotlin.version}</version>
-		</dependency>
+			</dependency>
 		 <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>
-            <version>${kotlin.version}</version>
-        </dependency>
+            </dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
-			<version>${kotlin.version}</version>
-		</dependency>
+			</dependency>
 
 		<dependency>
 			<groupId>org.jetbrains.kotlinx</groupId>
@@ -93,7 +90,6 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-test-junit</artifactId>
-			<version>${kotlin.version}</version>
 			<scope>test</scope>
 		</dependency>
 
diff --git a/parent-spring-4/pom.xml b/parent-spring-4/pom.xml
index 390934ca7b..b98d962580 100644
--- a/parent-spring-4/pom.xml
+++ b/parent-spring-4/pom.xml
@@ -1,7 +1,6 @@
 <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.baeldung</groupId>
     <artifactId>parent-spring-4</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>parent-spring-4</name>
diff --git a/parent-spring-5/pom.xml b/parent-spring-5/pom.xml
index e43e129c7f..f126006bcb 100644
--- a/parent-spring-5/pom.xml
+++ b/parent-spring-5/pom.xml
@@ -2,7 +2,6 @@
     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</groupId>
     <artifactId>parent-spring-5</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>parent-spring-5</name>