BAEL 4401 (#9913)

* BAEL-4401

* Update with master and resolve conflicts

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/nullmethodparameter/NullParameterExample.java

@@ -0,0 +1,17 @@
+package com.baeldung.nullmethodparameter;
+
+public class NullParameterExample {
+    public void processSomethingNotNull(Object myParameter) {
+        if (myParameter == null) {
+            throw new IllegalArgumentException("Parameter 'myParameter' cannot be null");
+        }
+        //Do something with the parameter
+    }
+    
+    public void processSomethingElseNotNull(Object myParameter) {
+        if (myParameter == null) {
+            throw new NullPointerException("Parameter 'myParameter' cannot be null");
+        }
+        //Do something with the parameter
+    }
+}