IG: fix "Unchecked exception class" inspection

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/errorhandling/UncheckedExceptionClassInspection.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2011 Dave Griffith, Bas Leijdekkers
+ * Copyright 2003-2015 Dave Griffith, Bas Leijdekkers
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,19 +44,11 @@ public class UncheckedExceptionClassInspection extends BaseInspection {
     return new UncheckedExceptionClassVisitor();
   }
 
-  private static class UncheckedExceptionClassVisitor
-    extends BaseInspectionVisitor {
+  private static class UncheckedExceptionClassVisitor extends BaseInspectionVisitor {
 
     @Override
     public void visitClass(@NotNull PsiClass aClass) {
-      if (!InheritanceUtil.isInheritor(aClass,
-                                       CommonClassNames.JAVA_LANG_THROWABLE)) {
-        return;
-      }
-      if (InheritanceUtil.isInheritor(aClass,
-                                      CommonClassNames.JAVA_LANG_EXCEPTION) &&
-          !InheritanceUtil.isInheritor(aClass,
-                                       CommonClassNames.JAVA_LANG_RUNTIME_EXCEPTION)) {
+      if (!InheritanceUtil.isInheritor(aClass, CommonClassNames.JAVA_LANG_RUNTIME_EXCEPTION)) {
         return;
       }
       registerClassError(aClass);

plugins/InspectionGadgets/test/com/siyeh/igtest/errorhandling/unchecked_exception_class/UncheckedExceptionClass.java

@@ -0,0 +1,5 @@
+public class <warning descr="Unchecked exception class 'UncheckedExceptionClass'">UncheckedExceptionClass</warning> extends RuntimeException {
+
+}
+class E1 extends Throwable {}
+class E2 extends Exception {}

plugins/InspectionGadgets/testsrc/com/siyeh/ig/errorhandling/UncheckedExceptionClassInspectionTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2000-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.siyeh.ig.errorhandling;
+
+import com.intellij.codeInspection.InspectionProfileEntry;
+import com.siyeh.ig.LightInspectionTestCase;
+import junit.framework.TestCase;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class UncheckedExceptionClassInspectionTest extends LightInspectionTestCase {
+
+  public void testUncheckedExceptionClass() {
+    doTest();
+  }
+
+  @Nullable
+  @Override
+  protected InspectionProfileEntry getInspection() {
+    return new UncheckedExceptionClassInspection();
+  }
+}