[JAVA-621] Ensuring each article has its own package

* Putting test classes directly under abstractclasses package (no need
for test subpackage, we're already in test sources)

* Removed unnecessary keyword package to just let superkeyword

* Renamed scope package to variableandmethodhiding

* Renamed package basicmethods into methods

* Putting test classes directly under methodoverloadingoverriding package (no need for test subpackage, we're already in test sources)

* Moved publicmodifier package under com.baeldung as it contains code from a separate article

* Moved privatemodifier under com.baeldung as it was under an unnecessary core package

* Renamed staticdemo package into staticmodifier (was more adequate with other modifiers articles)

* Putting test classes directly under defaultstaticinterfacemethods package (no need for test subpackage, we're already in test sources)

* Moved thiskeyword package to com.baeldung instead of under keywords package

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/privatemodifier/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.core.privatemodifier;
+package com.baeldung.privatemodifier;
 
 public class Employee {
 

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/privatemodifier/ExampleClass.java

@@ -1,4 +1,4 @@
-package com.baeldung.core.privatemodifier;
+package com.baeldung.privatemodifier;
 
 public class ExampleClass {
 

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/privatemodifier/PublicOuterClass.java

@@ -1,4 +1,4 @@
-package com.baeldung.core.privatemodifier;
+package com.baeldung.privatemodifier;
 
 public class PublicOuterClass {
 

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/publicmodifier/ListOfThree.java

@@ -1,4 +1,4 @@
-package com.baeldung.accessmodifiers.publicmodifier;
+package com.baeldung.publicmodifier;
 
 import java.util.AbstractList;
 import java.util.Arrays;

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/publicmodifier/SpecialCharacters.java

@@ -1,4 +1,4 @@
-package com.baeldung.accessmodifiers.publicmodifier;
+package com.baeldung.publicmodifier;
 
 public class SpecialCharacters {
 

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/publicmodifier/Student.java

@@ -1,4 +1,4 @@
-package com.baeldung.accessmodifiers.publicmodifier;
+package com.baeldung.publicmodifier;
 
 import java.math.BigDecimal;
 import java.sql.Connection;

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/staticmodifier/Car.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 /**
  * This class demonstrates the use of static fields and static methods

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/staticmodifier/Singleton.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 public class Singleton  {    
     private Singleton() {}

core-java-modules/core-java-lang-oop-modifiers/src/main/java/com/baeldung/staticmodifier/StaticBlock.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 import java.util.LinkedList;
 import java.util.List;

core-java-modules/core-java-lang-oop-modifiers/src/test/java/com/baeldung/defaultstaticinterfacemethods/StaticDefaulInterfaceMethodUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.defaultstaticinterfacemethods.test;
+package com.baeldung.defaultstaticinterfacemethods;
 
 import com.baeldung.defaultstaticinterfacemethods.model.Car;
 import com.baeldung.defaultstaticinterfacemethods.model.Motorbike;

core-java-modules/core-java-lang-oop-modifiers/src/test/java/com/baeldung/publicmodifier/PublicAccessModifierUnitTest.java

@@ -1,7 +1,5 @@
-package com.baeldung.accessmodifiers.publicmodifier;
+package com.baeldung.publicmodifier;
 
-import com.baeldung.accessmodifiers.publicmodifier.ListOfThree;
-import com.baeldung.accessmodifiers.publicmodifier.Student;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.api.TestInstance.Lifecycle;

core-java-modules/core-java-lang-oop-modifiers/src/test/java/com/baeldung/staticmodifier/CarUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 import static org.junit.Assert.*;
 

core-java-modules/core-java-lang-oop-modifiers/src/test/java/com/baeldung/staticmodifier/SingletonUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 import org.junit.Assert;
 import org.junit.Test;

core-java-modules/core-java-lang-oop-modifiers/src/test/java/com/baeldung/staticmodifier/StaticBlockUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.staticdemo;
+package com.baeldung.staticmodifier;
 
 import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
 import static org.junit.Assert.assertThat;