Remove duplicates in throws lists. #1555

Fixes `DuplicateThrows` inspection violations.

Description:
>This inspection reports duplicate exceptions in a method throws list.

src/it/java/com/google/checkstyle/test/chapter2filebasic/rule21filename/OuterTypeFilenameTest.java

@@ -22,7 +22,7 @@ public class OuterTypeFilenameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void outerTypeFilenameTest_1() throws IOException, Exception {
+    public void outerTypeFilenameTest_1() throws Exception {
 
         final String[] expected = {};
 
@@ -34,7 +34,7 @@ public class OuterTypeFilenameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void outerTypeFilenameTest_2() throws IOException, Exception {
+    public void outerTypeFilenameTest_2() throws Exception {
 
         final String[] expected = {};
 
@@ -46,7 +46,7 @@ public class OuterTypeFilenameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void outerTypeFilenameTest_3() throws IOException, Exception {
+    public void outerTypeFilenameTest_3() throws Exception {
 
         final String[] expected = {
             "3: " + getCheckMessage(OuterTypeFilenameCheck.class, "type.file.mismatch"),

src/it/java/com/google/checkstyle/test/chapter2filebasic/rule231filetab/FileTabCharacterTest.java

@@ -32,7 +32,7 @@ public class FileTabCharacterTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void fileTabTest() throws IOException, Exception {
+    public void fileTabTest() throws Exception {
 
         final DefaultConfiguration checkConfig = createConfig(true);
         final String[] expected = {

src/it/java/com/google/checkstyle/test/chapter2filebasic/rule232specialescape/IllegalTokenTextTest.java

@@ -18,12 +18,12 @@ public class IllegalTokenTextTest extends BaseCheckTestSupport{
     
     @BeforeClass
     public static void setConfigurationBuilder()
-    		throws CheckstyleException, MalformedURLException, IOException {
+    		throws CheckstyleException, IOException {
         builder = new ConfigurationBuilder(new File("src/it/"));
     }
 
     @Test
-    public void illegalTokensTest() throws IOException, Exception {
+    public void illegalTokensTest() throws Exception {
         
         final String[] expected = {
             "17:27: Avoid using corresponding octal or Unicode escape.",

src/it/java/com/google/checkstyle/test/chapter2filebasic/rule233nonascii/AvoidEscapedUnicodeCharactersCheckTest.java

@@ -22,7 +22,7 @@ public class AvoidEscapedUnicodeCharactersCheckTest extends BaseCheckTestSupport
     }
 
     @Test
-    public void unicodeEscapesTest() throws IOException, Exception {
+    public void unicodeEscapesTest() throws Exception {
 
         String msg = getCheckMessage(AvoidEscapedUnicodeCharactersCheck.class, "forbid.escaped.unicode.char");
 

src/it/java/com/google/checkstyle/test/chapter4formatting/rule411bracesareused/NeedBracesTest.java

@@ -22,7 +22,7 @@ public class NeedBracesTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void needBracesTest() throws IOException, Exception {
+    public void needBracesTest() throws Exception {
         
         Class<NeedBracesCheck> clazz = NeedBracesCheck.class;
         String messageKey = "needBraces";

src/it/java/com/google/checkstyle/test/chapter4formatting/rule413emptyblocks/EmptyBlockTest.java

@@ -22,7 +22,7 @@ public class EmptyBlockTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void emptyBlockTest() throws IOException, Exception {
+    public void emptyBlockTest() throws Exception {
         
         final String[] expected = {
             "19:21: " + getCheckMessage(EmptyBlockCheck.class, "block.empty", "if"),
@@ -68,7 +68,7 @@ public class EmptyBlockTest extends BaseCheckTestSupport{
     }
     
     @Test
-    public void emptyBlockTestCatch() throws IOException, Exception {
+    public void emptyBlockTestCatch() throws Exception {
         
         final String[] expected = {
             "29:17: " + getCheckMessage(EmptyBlockCheck.class, "block.empty", "finally"),

src/it/java/com/google/checkstyle/test/chapter4formatting/rule413emptyblocks/EmptyCatchBlockTest.java

@@ -23,7 +23,7 @@ public class EmptyCatchBlockTest extends BaseCheckTestSupport
     }
 
     @Test
-    public void emptyBlockTestCatch() throws IOException, Exception
+    public void emptyBlockTestCatch() throws Exception
     {
         
         final String[] expected = {
@@ -40,7 +40,7 @@ public class EmptyCatchBlockTest extends BaseCheckTestSupport
     }
 
     @Test
-    public void testNoViolations() throws IOException, Exception
+    public void testNoViolations() throws Exception
     {
         
         final String[] expected = {
@@ -54,7 +54,7 @@ public class EmptyCatchBlockTest extends BaseCheckTestSupport
     }
 
     @Test
-    public void testViolationsByComment() throws IOException, Exception
+    public void testViolationsByComment() throws Exception
     {
         
         final String[] expected = {
@@ -70,7 +70,7 @@ public class EmptyCatchBlockTest extends BaseCheckTestSupport
     }
 
     @Test
-    public void testViolationsByVariableName() throws IOException, Exception
+    public void testViolationsByVariableName() throws Exception
     {
         final String[] expected = {
             "19: " + getCheckMessage(EmptyCatchBlockCheck.class, "catch.block.empty"),

src/it/java/com/google/checkstyle/test/chapter4formatting/rule44cloumunlimit/LineLengthTest.java

@@ -22,7 +22,7 @@ public class LineLengthTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void lineLengthTest() throws IOException, Exception {
+    public void lineLengthTest() throws Exception {
         
         final String[] expected = {
              "5: " + getCheckMessage(LineLengthCheck.class, "maxLineLen", 100, 112),

src/it/java/com/google/checkstyle/test/chapter4formatting/rule451wheretobreack/MethodParamPadTest.java

@@ -22,7 +22,7 @@ public class MethodParamPadTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void operatorWrapTest() throws IOException, Exception {
+    public void operatorWrapTest() throws Exception {
         
         Class<MethodParamPadCheck> clazz = MethodParamPadCheck.class;
         String messageKey = "line.previous";

src/it/java/com/google/checkstyle/test/chapter4formatting/rule451wheretobreack/OperatorWrapTest.java

@@ -24,7 +24,7 @@ public class OperatorWrapTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void operatorWrapTest() throws IOException, Exception {
+    public void operatorWrapTest() throws Exception {
         
         Class<OperatorWrapCheck> clazz = OperatorWrapCheck.class;
         String messageKey = "line.new";

src/it/java/com/google/checkstyle/test/chapter4formatting/rule451wheretobreack/SeparatorWrapTest.java

@@ -22,7 +22,7 @@ public class SeparatorWrapTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void separatorWrapTest() throws IOException, Exception {
+    public void separatorWrapTest() throws Exception {
 
         final String[] expected = {
             "28:30: " + getCheckMessage(SeparatorWrapCheck.class, "line.new", "."),

src/it/java/com/google/checkstyle/test/chapter4formatting/rule4822variabledistance/VariableDeclarationUsageDistanceTest.java

@@ -22,7 +22,7 @@ public class VariableDeclarationUsageDistanceTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void arrayTypeStyleTest() throws IOException, Exception {
+    public void arrayTypeStyleTest() throws Exception {
 
         String msgExt = "variable.declaration.usage.distance.extend";
         Class<VariableDeclarationUsageDistanceCheck> clazz = VariableDeclarationUsageDistanceCheck.class;

src/it/java/com/google/checkstyle/test/chapter4formatting/rule4832nocstylearray/ArrayTypeStyleTest.java

@@ -22,7 +22,7 @@ public class ArrayTypeStyleTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void arrayTypeStyleTest() throws IOException, Exception {
+    public void arrayTypeStyleTest() throws Exception {
         
         String msg = getCheckMessage(ArrayTypeStyleCheck.class, "array.type.style");
 

src/it/java/com/google/checkstyle/test/chapter4formatting/rule4841indentation/IndentationTest.java

@@ -22,7 +22,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctClassTest() throws IOException, Exception {
+    public void correctClassTest() throws Exception {
 
         final String[] expected = {};
 
@@ -34,7 +34,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctFieldTest() throws IOException, Exception {
+    public void correctFieldTest() throws Exception {
 
         final String[] expected = {};
 
@@ -46,7 +46,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctForTest() throws IOException, Exception {
+    public void correctForTest() throws Exception {
 
         final String[] expected = {};
 
@@ -58,7 +58,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctIfTest() throws IOException, Exception {
+    public void correctIfTest() throws Exception {
 
         final String[] expected = {};
 
@@ -70,7 +70,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctTest() throws IOException, Exception {
+    public void correctTest() throws Exception {
 
         final String[] expected = {};
 
@@ -82,7 +82,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctReturnTest() throws IOException, Exception {
+    public void correctReturnTest() throws Exception {
 
         final String[] expected = {};
 
@@ -94,7 +94,7 @@ public class IndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void correctWhileTest() throws IOException, Exception {
+    public void correctWhileTest() throws Exception {
 
         final String[] expected = {};
 

src/it/java/com/google/checkstyle/test/chapter4formatting/rule4842fallthrow/FallThroughTest.java

@@ -22,7 +22,7 @@ public class FallThroughTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void fallThroughTest() throws IOException, Exception {
+    public void fallThroughTest() throws Exception {
 
         String msg = getCheckMessage(FallThroughCheck.class, "fall.through");
                      

src/it/java/com/google/checkstyle/test/chapter4formatting/rule485annotations/AnnotationLocationTest.java

@@ -22,7 +22,7 @@ public class AnnotationLocationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void annotationTest() throws IOException, Exception {
+    public void annotationTest() throws Exception {
         
         Class<AnnotationLocationCheck> clazz = AnnotationLocationCheck.class;
         String msgLocation = "annotation.location";

src/it/java/com/google/checkstyle/test/chapter4formatting/rule487modifiers/ModifierOrderTest.java

@@ -22,7 +22,7 @@ public class ModifierOrderTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void modifierOrderTest() throws IOException, Exception {
+    public void modifierOrderTest() throws Exception {
         
         Class<ModifierOrderCheck> clazz = ModifierOrderCheck.class;
         String msgMod = "mod.order";

src/it/java/com/google/checkstyle/test/chapter4formatting/rule488numericliterals/UpperEllTest.java

@@ -21,7 +21,7 @@ public class UpperEllTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void upperEllTest() throws IOException, Exception {
+    public void upperEllTest() throws Exception {
         
         final String[] expected = {
             "6:36: Should use uppercase 'L'.",

src/it/java/com/google/checkstyle/test/chapter5naming/rule521packagenames/PackageNameTest.java

@@ -27,7 +27,7 @@ public class PackageNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void goodPackageNameTest() throws IOException, Exception {
+    public void goodPackageNameTest() throws Exception {
 
 
         final String[] expected = {};
@@ -39,7 +39,7 @@ public class PackageNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void badPackageNameTest() throws IOException, Exception {
+    public void badPackageNameTest() throws Exception {
 
         String packagePath =
                 "com.google.checkstyle.test.chapter5naming.rule521packageNamesCamelCase";
@@ -56,7 +56,7 @@ public class PackageNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void badPackageName2Test() throws IOException, Exception {
+    public void badPackageName2Test() throws Exception {
 
 
         String packagePath = "com.google.checkstyle.test.chapter5naming.rule521_packagenames";
@@ -73,7 +73,7 @@ public class PackageNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void badPackageName3Test() throws IOException, Exception {
+    public void badPackageName3Test() throws Exception {
 
 
         String packagePath = "com.google.checkstyle.test.chapter5naming.rule521$packagenames";

src/it/java/com/google/checkstyle/test/chapter5naming/rule523methodnames/MethodNameTest.java

@@ -21,7 +21,7 @@ public class MethodNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void methodNameTest() throws IOException, Exception {
+    public void methodNameTest() throws Exception {
         
         Configuration checkConfig = builder.getCheckConfig("MethodName");
         String msgKey = "name.invalidPattern";

src/it/java/com/google/checkstyle/test/chapter5naming/rule525nonconstantfieldnames/MemberNameTest.java

@@ -26,7 +26,7 @@ public class MemberNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void memberNameTest() throws IOException, Exception {
+    public void memberNameTest() throws Exception {
 
         final String[] expected = {
             "5:16: " + getCheckMessage(checkConfig.getMessages(), msgKey, "mPublic", format),
@@ -51,7 +51,7 @@ public class MemberNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void simpleTest() throws IOException, Exception {
+    public void simpleTest() throws Exception {
 
         final String[] expected = {
             "12:17: " + getCheckMessage(checkConfig.getMessages(), msgKey, "bad$Static", format),

src/it/java/com/google/checkstyle/test/chapter5naming/rule526parameternames/ParameterNameTest.java

@@ -26,7 +26,7 @@ public class ParameterNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void parameterNameTest() throws IOException, Exception {
+    public void parameterNameTest() throws Exception {
 
         final String[] expected = {
             "8:21: " + getCheckMessage(checkConfig.getMessages(), MSG_KEY, "$arg1", format),

src/it/java/com/google/checkstyle/test/chapter5naming/rule527localvariablenames/LocalVariableNameTest.java

@@ -26,7 +26,7 @@ public class LocalVariableNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void localVariableNameTest() throws IOException, Exception {
+    public void localVariableNameTest() throws Exception {
 
         final String[] expected = {
             "26:13: " + getCheckMessage(checkConfig.getMessages(), msgKey, "a", format),
@@ -49,7 +49,7 @@ public class LocalVariableNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void oneCharTest() throws IOException, Exception {
+    public void oneCharTest() throws Exception {
 
         final String[] expected = {
             "15:13: " + getCheckMessage(checkConfig.getMessages(), msgKey, "i", format),

src/it/java/com/google/checkstyle/test/chapter5naming/rule528typevariablenames/ClassMethodTypeParameterNameTest.java

@@ -26,7 +26,7 @@ public class ClassMethodTypeParameterNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void testClassDefault() throws IOException, Exception {
+    public void testClassDefault() throws Exception {
 
         final String[] expected = {
             "5:31: " + getCheckMessage(checkConfig.getMessages(), msgKey, "t", format),
@@ -41,7 +41,7 @@ public class ClassMethodTypeParameterNameTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void testMethodDefault() throws IOException, Exception {
+    public void testMethodDefault() throws Exception {
 
         Configuration checkConfig = builder.getCheckConfig("MethodTypeParameterName");
 

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule711generalform/SingleLineJavadocTest.java

@@ -23,7 +23,7 @@ public class SingleLineJavadocTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void singleLineJavadocTest() throws IOException, Exception {
+    public void singleLineJavadocTest() throws Exception {
         
         String msg = getCheckMessage(SingleLineJavadocCheck.class, "singleline.javadoc");
 
@@ -46,7 +46,7 @@ public class SingleLineJavadocTest extends BaseCheckTestSupport{
     }
 
     @Test(expected = Exception.class)
-    public void customInlineTagTest() throws IOException, Exception{
+    public void customInlineTagTest() throws Exception{
         String msg = getCheckMessage(SingleLineJavadocCheck.class, "singleline.javadoc");
         
         Configuration checkConfig = builder.getCheckConfig("SingleLineJavadocCheck");

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule712paragraphs/JavadocParagraphTest.java

@@ -22,7 +22,7 @@ public class JavadocParagraphTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void javadocParagraphCorrectTest() throws IOException, Exception {
+    public void javadocParagraphCorrectTest() throws Exception {
 
         final String[] expected = {
         };
@@ -35,7 +35,7 @@ public class JavadocParagraphTest extends BaseCheckTestSupport{
     }
     
     @Test
-    public void javadocParagraphIncorrectTest() throws IOException, Exception {
+    public void javadocParagraphIncorrectTest() throws Exception {
 
         String msgBefore = getCheckMessage(JavadocParagraphCheck.class, "javadoc.paragraph.line.before");
         String msgRed = getCheckMessage(JavadocParagraphCheck.class, "javadoc.paragraph.redundant.paragraph");

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule713atclauses/AtclauseOrderTest.java

@@ -22,7 +22,7 @@ public class AtclauseOrderTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void noFinalizerBasicTest() throws IOException, Exception {
+    public void noFinalizerBasicTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 
@@ -38,7 +38,7 @@ public class AtclauseOrderTest extends BaseCheckTestSupport{
     }
     
     @Test
-    public void noFinalizerExtendedTest() throws IOException, Exception {
+    public void noFinalizerExtendedTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule713atclauses/JavadocTagContinuationIndentationTest.java

@@ -22,7 +22,7 @@ public class JavadocTagContinuationIndentationTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void noFinalizerBasicTest() throws IOException, Exception {
+    public void noFinalizerBasicTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 
@@ -38,7 +38,7 @@ public class JavadocTagContinuationIndentationTest extends BaseCheckTestSupport{
     }
     
     @Test
-    public void noFinalizerExtendedTest() throws IOException, Exception {
+    public void noFinalizerExtendedTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule713atclauses/NonEmptyAtclauseDescriptionTest.java

@@ -22,7 +22,7 @@ public class NonEmptyAtclauseDescriptionTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void noFinalizerBasicTest() throws IOException, Exception {
+    public void noFinalizerBasicTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 
@@ -38,7 +38,7 @@ public class NonEmptyAtclauseDescriptionTest extends BaseCheckTestSupport{
     }
     
     @Test
-    public void noFinalizerExtendedTest() throws IOException, Exception {
+    public void noFinalizerExtendedTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule72thesummaryfragment/SummaryJavadocTest.java

@@ -22,7 +22,7 @@ public class SummaryJavadocTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void noFinalizerBasicTest() throws IOException, Exception {
+    public void noFinalizerBasicTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 
@@ -38,7 +38,7 @@ public class SummaryJavadocTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void noFinalizerExtendedTest() throws IOException, Exception {
+    public void noFinalizerExtendedTest() throws Exception {
         
         String msg = getCheckMessage(NoFinalizerCheck.class, "avoid.finalizer.method");
 

src/it/java/com/google/checkstyle/test/chapter7javadoc/rule731selfexplanatory/JavadocMethodTest.java

@@ -22,7 +22,7 @@ public class JavadocMethodTest extends BaseCheckTestSupport{
     }
 
     @Test
-    public void javadocMethodTest() throws IOException, Exception {
+    public void javadocMethodTest() throws Exception {
 
         String msg = getCheckMessage(JavadocMethodCheck.class, "javadoc.missing");