removed generic warning

org.springframework.core/src/main/java/org/springframework/core/convert/support/ObjectToStringConverter.java

@@ -37,18 +37,18 @@ import org.springframework.core.convert.converter.ConditionalGenericConverter;
  */
 final class ObjectToStringConverter implements ConditionalGenericConverter {
 
+	public Set<ConvertiblePair> getConvertibleTypes() {
+		return Collections.singleton(new ConvertiblePair(Object.class, String.class));
+	}
+
 	public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		Class sourceClass = sourceType.getObjectType();
+		Class<?> sourceClass = sourceType.getObjectType();
 		return Number.class.isAssignableFrom(sourceClass) || Boolean.class.equals(sourceClass) ||
 				Character.class.equals(sourceClass) || CharSequence.class.isAssignableFrom(sourceClass) ||
 				StringWriter.class.isAssignableFrom(sourceClass) || sourceClass.isEnum() ||
 				ObjectToObjectConverter.hasValueOfMethodOrConstructor(sourceClass, String.class);
 	}
 
-	public Set<ConvertiblePair> getConvertibleTypes() {
-		return Collections.singleton(new ConvertiblePair(Object.class, String.class));
-	}
-
 	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
 		return (source != null ? source.toString() : null);
 	}