BAEL-2516 catching errors in catch blocks (#7075)

* BAEL-2516 catching errors in catch block

* BAEL-2516 catching errors in catch block; classes moved

core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exception/error/ErrorGeneratorUnitTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.error;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ErrorGeneratorUnitTest {
+
+    @Test(expected = AssertionError.class)
+    public void whenError_thenIsNotCaughtByCatchException() {
+        try {
+            throw new AssertionError();
+        } catch (Exception e) {
+            Assert.fail(); // errors are not caught by catch exception
+        }
+    }
+
+    @Test
+    public void whenError_thenIsCaughtByCatchError() {
+        try {
+            throw new AssertionError();
+        } catch (Error e) {
+            // caught! -> test pass
+        }
+    }
+}