avoiding code repetition

src/main/java/be/uantwerpen/datamining/pattern_mining/ArffToSPMF.java

@@ -131,10 +131,11 @@ public class ArffToSPMF {
 			}
 
 		}
-		File transactiondb = new File("./temp",
+		File transactiondb = new File("./temp", IOUtils.getFileWithDifferentExtension(IOUtils.getFileWithDifferentSuffix(arff,
 			isSequence ?
-				IOUtils.getFileWithDifferentExtension(IOUtils.getFileWithDifferentSuffix(arff, "-sequencedb"),"txt").getName():
-				IOUtils.getFileWithDifferentExtension(IOUtils.getFileWithDifferentSuffix(arff, "-transactions"),"txt").getName()
+				"-sequencedb":
+				"-transactions"
+			),"txt").getName()
 		);
 
 		IOUtils.saveFile(transactions, transactiondb);