diff --git a/monkey/monkey_island/cc/dal/IAgentRepository.py b/monkey/monkey_island/cc/dal/IAgentRepository.py
new file mode 100644
index 000000000..5a784e5d2
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IAgentRepository.py
@@ -0,0 +1,15 @@
+from abc import ABC
+from typing import Optional, Sequence
+
+from monkey_island.cc.models import Monkey
+
+
+class IAgentRepository(ABC):
+    # TODO rename Monkey document to Agent
+    def save_agent(self, agent: Monkey):
+        pass
+
+    def get_agents(
+        self, id: Optional[str] = None, running: Optional[bool] = None
+    ) -> Sequence[Monkey]:
+        pass
diff --git a/monkey/monkey_island/cc/dal/IAttackRepository.py b/monkey/monkey_island/cc/dal/IAttackRepository.py
new file mode 100644
index 000000000..f1c6c0213
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IAttackRepository.py
@@ -0,0 +1,24 @@
+from abc import ABC
+from typing import Sequence
+
+from monkey_island.cc.models.attack import Mitigation
+
+
+class IRepository(ABC):
+    # Att&ck just add not implemented raises
+    ######################################
+    # This will likely stay the same as mitigations are external data
+    def save_mitigations(self, mitigations: Sequence[Mitigation]):
+        pass
+
+    # This will likely remain if we plan to keep the report actionable
+    def get_mitigation_by_technique(self, technique_id: str) -> Mitigation:
+        pass
+
+    # This could go away, since attack report is not costly to generate and we'll refactor it
+    def save_attack_report(self, attack_report: dict):
+        raise NotImplementedError
+
+    # This will probably go away once we use endpoints instead
+    def get_attack_report(self):
+        raise NotImplementedError
diff --git a/monkey/monkey_island/cc/dal/IConfigRepository.py b/monkey/monkey_island/cc/dal/IConfigRepository.py
new file mode 100644
index 000000000..70e59a89f
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IConfigRepository.py
@@ -0,0 +1,30 @@
+from abc import ABC
+from typing import Any, Mapping, Sequence
+
+
+class IConfigRepository(ABC):
+
+    # Config
+    ###############################################
+
+    # This returns the current config
+    # TODO investigate if encryption should be here or where
+    # TODO potentially should be a DTO as well, but it's structure is defined in schema already
+    def get_config(self) -> Mapping:
+        pass
+
+    def set_config(self, config: dict):
+        pass
+
+    # Used when only a subset of config is submitted, for example only PBAFiles
+    # Used by passing keys, like ['monkey', 'post_breach_actions', 'linux_filename']
+    # Using a list is less ambiguous IMO, than using . notation
+    def set_config_field(self, key_list: Sequence[str], value: Any):
+        pass
+
+    # Used when only a subset of config is needed, for example only PBAFiles
+    # Used by passing keys, like ['monkey', 'post_breach_actions', 'linux_filename']
+    # Using a list is less ambiguous IMO, than using . notation
+    # TODO Still in doubt about encryption, this should probably be determined automatically
+    def get_config_field(self, key_list: Sequence[str]) -> Any:
+        pass
diff --git a/monkey/monkey_island/cc/dal/IEdgeRepository.py b/monkey/monkey_island/cc/dal/IEdgeRepository.py
new file mode 100644
index 000000000..3b1393f31
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IEdgeRepository.py
@@ -0,0 +1,30 @@
+from abc import ABC
+from typing import Optional, Sequence
+
+from monkey_island.cc.models.edge import Edge
+
+
+class IEdgeRepository(ABC):
+    def get_all_edges(self):
+        pass
+
+    def get_edges(self, src_machine_id: str, dst_machine_id: str) -> Sequence[Edge]:
+        pass
+
+    def save_edge(self, edge: Edge):
+        pass
+
+    def get_by_dst(self, dst_machine_id: str) -> Sequence[Edge]:
+        pass
+
+    # If tunnel is None then it gets all edges, if True/False then gets only
+    # tunneling/non-tunneling edges
+    def get_by_src(self, src_machine_id: str, tunnel: Optional[bool] = None) -> Sequence[Edge]:
+        pass
+
+    def get_by_id(self, edge_id: str) -> Edge:
+        pass
+
+    # Scan telemetries might change the label once we know more about the target system
+    def set_label(self, edge_id: str, label: str):
+        pass
diff --git a/monkey/monkey_island/cc/dal/IMachineRepository.py b/monkey/monkey_island/cc/dal/IMachineRepository.py
new file mode 100644
index 000000000..99e7f49dc
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IMachineRepository.py
@@ -0,0 +1,19 @@
+from abc import ABC
+from typing import Optional, Sequence
+
+
+class IMachineRepository(ABC):
+    # TODO define Machine object(ORM model)
+    def save_machine(self, machine: Machine):
+        pass
+
+    # TODO define Machine object(ORM model)
+    # TODO define or re-use machine state.
+    def get_machines(
+        self,
+        id: Optional[str] = None,
+        ips: Optional[Sequence[str]] = None,
+        state: Optional[MachineState] = None,
+        is_island: Optional[bool] = None,
+    ) -> Sequence[Machine]:
+        pass
diff --git a/monkey/monkey_island/cc/dal/IReportRepository.py b/monkey/monkey_island/cc/dal/IReportRepository.py
new file mode 100644
index 000000000..6891c3c50
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/IReportRepository.py
@@ -0,0 +1,14 @@
+from abc import ABC
+
+from monkey_island.cc.models import Report
+
+
+class IReportRepository(ABC):
+    # Report (potentially should go away if split up into proper endpoints/services)
+    #################################
+    def save_report(self, report: Report):
+        pass
+
+    # Should return only one
+    def get_report(self) -> Report:
+        pass
diff --git a/monkey/monkey_island/cc/dal/ISimulationRepository.py b/monkey/monkey_island/cc/dal/ISimulationRepository.py
new file mode 100644
index 000000000..96cc3dc17
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/ISimulationRepository.py
@@ -0,0 +1,11 @@
+from abc import ABC
+
+
+class ISimulationRepository(ABC):
+    # TODO define simulation object. It should contain metadata about simulation,
+    # like start, end times, mode and last forced stop of all monkeys
+    def save_simulation(self, simulation: Simulation):
+        pass
+
+    def get_simulation(self):
+        pass
diff --git a/monkey/monkey_island/cc/dal/ITelemetryRepository.py b/monkey/monkey_island/cc/dal/ITelemetryRepository.py
new file mode 100644
index 000000000..69aa2ff35
--- /dev/null
+++ b/monkey/monkey_island/cc/dal/ITelemetryRepository.py
@@ -0,0 +1,20 @@
+from abc import ABC
+from typing import Optional, Sequence
+
+from monkey_island.cc.models.telemetries.telemetry import Telemetry
+
+
+class ITelemetryRepository(ABC):
+    def save_telemetry(self, telemetry: Telemetry):
+        pass
+
+    # TODO define all telemetry types
+    # Potentially we'll need to define each telem type separately. As it stands there's no way to
+    # get exploit telemetries by exploiter for example
+    def get_telemetries(
+        self,
+        id: Optional[str] = None,
+        type: Optional[TelemetryType] = None,
+        monkey_id: Optional[str] = None,
+    ) -> Sequence[Telemetry]:
+        pass