remove use of NRE

spring-binding/src/main/java/org/springframework/binding/convert/ConversionException.java

@@ -15,30 +15,28 @@
  */
 package org.springframework.binding.convert;
 
-import org.springframework.core.NestedRuntimeException;
-
 /**
  * Base class for exceptions thrown by the type conversion system.
  * 
  * @author Keith Donald
  */
-public class ConversionException extends NestedRuntimeException {
+public class ConversionException extends RuntimeException {
 
 	/**
 	 * The source type we tried to convert from
 	 */
 	private Class sourceClass;
 
-	/**
-	 * The value we tried to convert. Transient because we cannot guarantee that the value is Serializable.
-	 */
-	private transient Object value;
-
 	/**
 	 * The target type we tried to convert to.
 	 */
 	private Class targetClass;
 
+	/**
+	 * The value we tried to convert. Transient because we cannot guarantee that the value is Serializable.
+	 */
+	private transient Object value;
+
 	/**
 	 * Creates a new conversion exception.
 	 * @param value the value we tried to convert

spring-binding/src/main/java/org/springframework/binding/expression/ParserException.java

@@ -15,14 +15,12 @@
  */
 package org.springframework.binding.expression;
 
-import org.springframework.core.NestedRuntimeException;
-
 /**
  * Base class for exceptions thrown during expression parsing.
  * 
  * @author Keith Donald
  */
-public class ParserException extends NestedRuntimeException {
+public class ParserException extends RuntimeException {
 
 	/**
 	 * The expression string that could not be parsed.

spring-binding/src/main/java/org/springframework/binding/format/InvalidFormatException.java

@@ -15,14 +15,12 @@
  */
 package org.springframework.binding.format;
 
-import org.springframework.core.NestedRuntimeException;
-
 /**
  * Thrown when a formatted value is of the wrong form.
  * 
  * @author Keith Donald
  */
-public class InvalidFormatException extends NestedRuntimeException {
+public class InvalidFormatException extends RuntimeException {
 
 	private String invalidValue;
 

spring-binding/src/main/java/org/springframework/binding/method/InvalidMethodKeyException.java

@@ -15,14 +15,13 @@
  */
 package org.springframework.binding.method;
 
-import org.springframework.core.NestedRuntimeException;
 
 /**
  * Thrown when a method key could not be resolved to an invokable java Method on a Class.
  * 
  * @author Keith Donald
  */
-public class InvalidMethodKeyException extends NestedRuntimeException {
+public class InvalidMethodKeyException extends RuntimeException {
 
 	/**
 	 * The method key that could not be resolved.

spring-binding/src/main/java/org/springframework/binding/method/MethodInvocationException.java

@@ -17,7 +17,6 @@ package org.springframework.binding.method;
 
 import java.lang.reflect.InvocationTargetException;
 
-import org.springframework.core.NestedRuntimeException;
 import org.springframework.core.style.StylerUtils;
 
 /**
@@ -25,7 +24,7 @@ import org.springframework.core.style.StylerUtils;
  * 
  * @author Keith Donald
  */
-public class MethodInvocationException extends NestedRuntimeException {
+public class MethodInvocationException extends RuntimeException {
 
 	/**
 	 * The method signature. Transient because a MethodSignature is not Serializable.