native exception handling added

modules/java/src/java/CvException.java

@@ -0,0 +1,15 @@
+package org.opencv;
+
+public class CvException extends Exception {
+
+	private static final long serialVersionUID = 1L;
+
+	public CvException(String msg) {
+		super(msg);
+	}
+
+	@Override
+	public String toString() {
+		return "CvException [" + super.toString() + "]";
+	}
+}