added class backup handler to git

src/main/java/com/bwssystems/HABridge/BackupHandler.java

@@ -0,0 +1,93 @@
+package com.bwssystems.HABridge;
+
+import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class BackupHandler {
+    final Logger log = LoggerFactory.getLogger(BackupHandler.class);
+    private Path repositoryPath;
+    private String fileExtension;
+    private String defaultName;
+
+	protected void setupParams(Path aPath, String anExtension, String adefaultName) {
+		repositoryPath = aPath;
+		if(anExtension.substring(0, 1).equalsIgnoreCase("."))
+			fileExtension = anExtension;
+		else
+			fileExtension = "." + anExtension;
+		
+		defaultName = adefaultName;
+	}
+
+	public String backup(String aFilename) {
+        if(aFilename == null || aFilename.equalsIgnoreCase("")) {
+        	DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
+        	aFilename = defaultName + dateFormat.format(Calendar.getInstance().getTime()) + fileExtension; 
+        }
+        else
+        	aFilename = aFilename + fileExtension;
+    	try {
+			Files.copy(repositoryPath, FileSystems.getDefault().getPath(repositoryPath.getParent().toString(), aFilename), StandardCopyOption.COPY_ATTRIBUTES);
+		} catch (IOException e) {
+			log.error("Could not backup to file: " + aFilename + " message: " + e.getMessage(), e);
+		}
+        log.debug("Backup repository: " + aFilename);
+        return aFilename;
+    }
+
+	public String deleteBackup(String aFilename) {
+        log.debug("Delete backup repository: " + aFilename);
+        try {
+			Files.delete(FileSystems.getDefault().getPath(repositoryPath.getParent().toString(), aFilename));
+		} catch (IOException e) {
+			log.error("Could not delete file: " + aFilename + " message: " + e.getMessage(), e);
+		}
+        return aFilename;
+    }
+
+	public String restoreBackup(String aFilename) {
+        log.debug("Restore backup repository: " + aFilename);
+		try {
+			Path target = null;
+			if(Files.exists(repositoryPath)) {
+	        	DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
+				target = FileSystems.getDefault().getPath(repositoryPath.getParent().toString(), defaultName + dateFormat.format(Calendar.getInstance().getTime()) + fileExtension);
+				Files.move(repositoryPath, target);
+			}
+			Files.copy(FileSystems.getDefault().getPath(repositoryPath.getParent().toString(), aFilename), repositoryPath, StandardCopyOption.COPY_ATTRIBUTES);
+		} catch (IOException e) {
+			log.error("Error restoring the file: " + aFilename + " message: " + e.getMessage(), e);
+			return null;
+		}
+        return aFilename;
+    }
+
+	public List<String> getBackups() {
+		List<String> theFilenames = new ArrayList<String>();
+		Path dir = repositoryPath.getParent();
+		try (DirectoryStream<Path> stream =
+		     Files.newDirectoryStream(dir, "*.{"+ fileExtension + "}")) {
+		    for (Path entry: stream) {
+		        theFilenames.add(entry.getFileName().toString());
+		    }
+		} catch (IOException x) {
+		    // IOException can never be thrown by the iteration.
+		    // In this snippet, it can // only be thrown by newDirectoryStream.
+			log.error("Issue getting directory listing for backups - " + x.getMessage());
+		}
+		return theFilenames;
+	}
+	
+}

src/main/java/com/bwssystems/harmony/HarmonyHome.java

@@ -10,7 +10,6 @@ import java.util.Set;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.bwssystems.HABridge.BridgeSettings;
 import com.bwssystems.HABridge.BridgeSettingsDescriptor;
 import com.bwssystems.HABridge.IpList;
 import com.bwssystems.HABridge.NamedIP;