return information about the plotted sequences

this information can be used for tests

pdb-ui/src/main/java/org/lucares/pdbui/BadRequest.java

@@ -0,0 +1,18 @@
+package org.lucares.pdbui;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "BadRequest")
+public class BadRequest extends RuntimeException {
+
+	private static final long serialVersionUID = 694206253376122420L;
+
+	public BadRequest(final String message, final Throwable cause) {
+		super(message, cause);
+	}
+
+	public BadRequest(final Throwable cause) {
+		super(cause);
+	}
+}