Index: src/SL3Connection.m
==================================================================
--- src/SL3Connection.m
+++ src/SL3Connection.m
@@ -20,11 +20,11 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #import "SL3Connection.h"
 
-#import "SL3Exception.h"
+#import "SL3OpenFailedException.h"
 
 @implementation SL3Connection
 + (instancetype)connectionWithPath: (OFString *)path
 			     flags: (int)flags
 {
@@ -40,14 +40,14 @@
 	@try {
 		int errorCode = sqlite3_open_v2(path.UTF8String, &_database,
 		    flags, NULL);
 
 		if (errorCode != SQLITE_OK)
-			/* TODO: Use an SL3Exception subclass. */
-			@throw [SL3Exception
-			    exceptionWithConnection: nil
-					  errorCode: errorCode];
+			@throw [SL3OpenFailedException
+			    exceptionWithPath: path
+					flags: flags
+				    errorCode: errorCode];
 	} @catch (id e) {
 		[self release];
 		@throw e;
 	}
 

Index: src/exceptions/Makefile
==================================================================
--- src/exceptions/Makefile
+++ src/exceptions/Makefile
@@ -1,11 +1,12 @@
 include ../../extra.mk
 
 STATIC_PIC_LIB_NOINST = ${EXCEPTIONS_LIB_A}
 STATIC_LIB_NOINST = ${EXCEPTIONS_A}
 
-SRCS = SL3Exception.m
+SRCS = SL3Exception.m		\
+       SL3OpenFailedException.m
 
 INCLUDES = ${SRCS:.m=.h}
 
 include ../../buildsys.mk
 

Index: src/exceptions/SL3Exception.h
==================================================================
--- src/exceptions/SL3Exception.h
+++ src/exceptions/SL3Exception.h
@@ -33,12 +33,14 @@
 }
 
 @property OF_NULLABLE_PROPERTY (readonly, nonatomic) SL3Connection *connection;
 @property (readonly, nonatomic) int errorCode;
 
++ (instancetype)exception OF_UNAVAILABLE;
 + (instancetype)exceptionWithConnection: (nullable SL3Connection *)connection
 			      errorCode: (int)errorCode;
+- (instancetype)init OF_UNAVAILABLE;
 - (instancetype)initWithConnection: (nullable SL3Connection *)connection
 			 errorCode: (int)errorCode OF_DESIGNATED_INITIALIZER;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/exceptions/SL3Exception.m
==================================================================
--- src/exceptions/SL3Exception.m
+++ src/exceptions/SL3Exception.m
@@ -22,17 +22,27 @@
 
 #import "SL3Exception.h"
 
 @implementation SL3Exception
 @synthesize connection = _connection, errorCode = _errorCode;
+
++ (instancetype)exception
+{
+	OF_UNRECOGNIZED_SELECTOR
+}
 
 + (instancetype)exceptionWithConnection: (SL3Connection *)connection
 			      errorCode: (int)errorCode
 {
 	return [[[self alloc] initWithConnection: connection
 				       errorCode: errorCode] autorelease];
 }
+
+- (instancetype)init
+{
+	OF_INVALID_INIT_METHOD
+}
 
 - (instancetype)initWithConnection: (SL3Connection *)connection
 			 errorCode: (int)errorCode
 {
 	self = [super init];

ADDED   src/exceptions/SL3OpenFailedException.h
Index: src/exceptions/SL3OpenFailedException.h
==================================================================
--- /dev/null
+++ src/exceptions/SL3OpenFailedException.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2020, Jonathan Schleifer <js@nil.im>
+ *
+ * https://fossil.nil.im/objsqlite3
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "SL3Exception.h"
+
+OF_ASSUME_NONNULL_BEGIN
+
+@interface SL3OpenFailedException: SL3Exception
+{
+	OFString *_path;
+	int _flags;
+}
+
+@property (readonly, nonatomic) OFString *path;
+@property (readonly, nonatomic) int flags;
+
++ (instancetype)exceptionWithConnection: (nullable SL3Connection *)connection
+			      errorCode: (int)errorCode OF_UNAVAILABLE;
++ (instancetype)exceptionWithPath: (OFString *)path
+			    flags: (int)flags
+			errorCode: (int)errorCode;
+- (instancetype)initWithConnection: (nullable SL3Connection *)connection
+			 errorCode: (int)errorCode OF_UNAVAILABLE;
+- (instancetype)initWithPath: (OFString *)path
+		       flags: (int)flags
+		   errorCode: (int)errorCode OF_DESIGNATED_INITIALIZER;
+@end
+
+OF_ASSUME_NONNULL_END

ADDED   src/exceptions/SL3OpenFailedException.m
Index: src/exceptions/SL3OpenFailedException.m
==================================================================
--- /dev/null
+++ src/exceptions/SL3OpenFailedException.m
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2020, Jonathan Schleifer <js@nil.im>
+ *
+ * https://fossil.nil.im/objsqlite3
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "SL3OpenFailedException.h"
+
+@implementation SL3OpenFailedException
+@synthesize path = _Path, flags = _flags;
+
++ (instancetype)exceptionWithConnection: (SL3Connection *)connection
+			      errorCode: (int)errorCode OF_UNAVAILABLE
+{
+	OF_UNRECOGNIZED_SELECTOR
+}
+
++ (instancetype)exceptionWithPath: (OFString *)path
+			    flags: (int)flags
+			errorCode: (int)errorCode
+{
+	return [[[self alloc] initWithPath: path
+				     flags: flags
+				 errorCode: errorCode] autorelease];
+}
+
+- (instancetype)initWithConnection: (SL3Connection *)connection
+			 errorCode: (int)errorCode OF_UNAVAILABLE
+{
+	OF_INVALID_INIT_METHOD
+}
+
+- (instancetype)initWithPath: (OFString *)path
+		       flags: (int)flags
+		   errorCode: (int)errorCode
+{
+	self = [super initWithConnection: nil
+			       errorCode: errorCode];
+
+	@try {
+		_path = [path copy];
+		_flags = flags;
+	} @catch (id e) {
+		[self release];
+		@throw e;
+	}
+
+	return self;
+}
+@end