Cleaned up database initialisation.

briar-api/src/org/briarproject/api/StringMap.java

@@ -26,4 +26,18 @@ abstract class StringMap extends Hashtable<String, String> {
 	public void putBoolean(String key, boolean value) {
 		put(key, String.valueOf(value));
 	}
+
+	public int getInt(String key, int defaultValue) {
+		String s = get(key);
+		if (s == null) return defaultValue;
+		try {
+			return Integer.valueOf(s);
+		} catch (NumberFormatException e) {
+			return defaultValue;
+		}
+	}
+
+	public void putInt(String key, int value) {
+		put(key, String.valueOf(value));
+	}
 }

briar-api/src/org/briarproject/api/db/DatabaseComponent.java

@@ -31,7 +31,7 @@ import java.util.Map;
 public interface DatabaseComponent {
 
 	/** Opens the database and returns true if the database already existed. */
-	boolean open() throws DbException, IOException;
+	boolean open() throws DbException;
 
 	/** Waits for any open transactions to finish and closes the database. */
 	void close() throws DbException, IOException;