[JENKINS-19990] Catch specific Exceptions.

src/main/java/hudson/plugins/parameterizedtrigger/FileBuildParameterFactory.java

@@ -27,6 +27,8 @@
 import java.io.IOException;
 import java.io.PrintStream;
 import java.nio.charset.Charset;
+import java.nio.charset.IllegalCharsetNameException;
+import java.nio.charset.UnsupportedCharsetException;
 import java.util.ArrayList;
 import java.util.List;
 import org.apache.commons.lang.StringUtils;
@@ -154,8 +156,10 @@ public FormValidation doCheckEncoding(@QueryParameter String encoding) {
             if (!StringUtils.isBlank(encoding)) {
                 try {
                     Charset.forName(encoding.trim());
-                } catch(Exception e) {
-                    return FormValidation.error(e, "Unsupported Encoding");
+                } catch(UnsupportedCharsetException e) {
+                    return FormValidation.error("Unsupported Encoding");
+                } catch(IllegalCharsetNameException e) {
+                    return FormValidation.error("Bad Encoding Name");
                 }
                 if(!ParameterizedTriggerUtils.isSupportNonAsciiPropertiesFile()) {
                     return FormValidation.warning("Non-ascii properties files are supported only since Java 1.6.");

src/main/java/hudson/plugins/parameterizedtrigger/FileBuildParameters.java

@@ -15,6 +15,8 @@
 
 import java.io.IOException;
 import java.nio.charset.Charset;
+import java.nio.charset.IllegalCharsetNameException;
+import java.nio.charset.UnsupportedCharsetException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -111,8 +113,10 @@ public FormValidation doCheckEncoding(@QueryParameter String encoding) {
 			if (!StringUtils.isBlank(encoding)) {
 				try {
 					Charset.forName(encoding.trim());
-				} catch(Exception e) {
-					return FormValidation.error(e, "Unsupported Encoding");
+				} catch(UnsupportedCharsetException e) {
+					return FormValidation.error("Unsupported Encoding");
+				} catch(IllegalCharsetNameException e) {
+					return FormValidation.error("Bad Encoding Name");
 				}
 				if(!ParameterizedTriggerUtils.isSupportNonAsciiPropertiesFile()) {
 					return FormValidation.warning("Non-ascii properties files are supported only since Java 1.6.");

src/main/java/hudson/plugins/parameterizedtrigger/ParameterizedTriggerUtils.java

@@ -84,7 +84,7 @@ public static boolean isSupportNonAsciiPropertiesFile() {
         try {
             // Is {@link Properties#load(java.io.Reader)} supported?
             Properties.class.getMethod("load", Reader.class);
-        } catch(Exception _) {
+        } catch(NoSuchMethodException _) {
             return false;
         }
         return true;