Add Tor plugin to headless client and introduce new ConfigurationManager

bramble-j2se/src/main/java/org/briarproject/bramble/system/JavaConfigurationManager.java

@@ -0,0 +1,56 @@
+package org.briarproject.bramble.system;
+
+import org.briarproject.bramble.api.ConfigurationManager;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.attribute.PosixFilePermission;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+
+import static java.nio.file.Files.setPosixFilePermissions;
+import static java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE;
+import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
+import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@NotNullByDefault
+class JavaConfigurationManager implements ConfigurationManager {
+
+	private static final Logger LOG =
+			Logger.getLogger(JavaConfigurationManager.class.getName());
+
+	@Inject
+	public JavaConfigurationManager() {
+		try {
+			ensurePermissions(getAppDir());
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+		}
+	}
+
+	@Override
+	public File getAppDir() {
+		String home = System.getProperty("user.home");
+		return new File(home + File.separator + ".briar");
+	}
+
+	private void ensurePermissions(File file)throws IOException {
+		if (!file.exists()) {
+			if (!file.mkdirs()) {
+				throw new IOException("Could not create directory");
+			}
+		}
+		Set<PosixFilePermission> perms = new HashSet<>();
+		perms.add(OWNER_READ);
+		perms.add(OWNER_WRITE);
+		perms.add(OWNER_EXECUTE);
+		setPosixFilePermissions(file.toPath(), perms);
+	}
+
+}