BAEL-6699: Java Interface Naming Conventions (#14551)

* interfaces and implementations

* code review changes

core-java-modules/core-java-lang-oop-others/src/main/java/com/baeldung/interfaces/namingconventions/Identifiable.java

@@ -0,0 +1,5 @@
+package com.baeldung.interfaces.namingconventions;
+
+public interface Identifiable {
+    void identify();
+}

core-java-modules/core-java-lang-oop-others/src/main/java/com/baeldung/interfaces/namingconventions/RegularUser.java

@@ -0,0 +1,13 @@
+package com.baeldung.interfaces.namingconventions;
+
+public class RegularUser implements User {
+    @Override
+    public void identify() {
+        // some implementation
+    }
+
+    @Override
+    public void authorize() {
+        // some implementation
+    }
+}

core-java-modules/core-java-lang-oop-others/src/main/java/com/baeldung/interfaces/namingconventions/RootUser.java

@@ -0,0 +1,13 @@
+package com.baeldung.interfaces.namingconventions;
+
+public class RootUser implements User {
+    @Override
+    public void identify() {
+        // some implementation
+    }
+
+    @Override
+    public void authorize() {
+        // some implementation
+    }
+}

core-java-modules/core-java-lang-oop-others/src/main/java/com/baeldung/interfaces/namingconventions/User.java

@@ -0,0 +1,5 @@
+package com.baeldung.interfaces.namingconventions;
+
+public interface User extends Identifiable {
+    void authorize();
+}